Problema no arquivo includes/router.php

Oi pessoal!

Estou com um problema no meu site, até consigo acessar o painel de administração, mas o site em si apresenta o seguinte erro:

PHP Fatal error: Call to a member function getDefault() on a non-object in x:\x\xxxxx.com\x\x\x\includes\router.php on line 123

Já dei uma olhada no arquivo router, mas não imagino o que pode estar acontecendo, nem sei o problema é exatamente na linha 123 "$item = $menu->getDefault();"

Alguém já passou por isso, poderia me ajudar?

Ta ai o código;)

<?php
/**
* @version $Id: router.php 8180 2007-07-23 05:52:29Z eddieajau $
* @package Joomla.Framework
* @subpackage Application
* @copyright Copyright (C) 2005 - 2010 Open Source Matters. All rights reserved.
* @license GNU/GPL, see LICENSE.php
* Joomla! is free software. This version may have been modified pursuant
* to the GNU General Public License, and as distributed it includes or
* is derivative of works licensed under the GNU General Public License or
* other free or open source software licenses.
* See COPYRIGHT.php for copyright notices and details.
*/

// Check to ensure this file is within the rest of the framework
defined('JPATH_BASE') or die();

/**
* Class to create and parse routes for the site application
*
* @package Joomla
* @since 1.5
*/
class JRouterSite extends JRouter
{
/**
* Class constructor
*
* @access public
*/

function __construct($options = array()) {
	parent::__construct($options);
}

function parse(&$uri)

{

	$vars = array();

	// Get the application
	$app =& JFactory::getApplication();

	if($app->getCfg('force_ssl') == 2 && strtolower($uri->getScheme()) != 'https') {
 //forward to https
 $uri->setScheme('https');
 $app->redirect($uri->toString());
	}

	// Get the path
	$path = $uri->getPath();

	//Remove the suffix
	if($this->_mode == JROUTER_MODE_SEF)
	{

 if($app->getCfg('sef_suffix') && !(substr($path, -9) == 'index.php' || substr($path, -1) == '/'))
 {
 if($suffix = pathinfo($path, PATHINFO_EXTENSION))
 {
 $path = str_replace('.'.$suffix, '', $path);
 $vars['format'] = $suffix;
 }
 }
	}

	//Remove basepath
	$path = substr_replace($path, '', 0, strlen(JURI::base(true)));

	//Remove prefix
	$path = str_replace('index.php', '', $path);

	//Set the route
	$uri->setPath(trim($path , '/'));

	$vars += parent::parse($uri);

	return $vars;
}

function &build($url)
{

	$uri =& parent::build($url);

	// Get the path data
	$route = $uri->getPath();

	//Add the suffix to the uri
	if($this->_mode == JROUTER_MODE_SEF && $route)
	{
 $app =& JFactory::getApplication();

 if($app->getCfg('sef_suffix') && !(substr($route, -9) == 'index.php' || substr($route, -1) == '/'))
 {
 if($format = $uri->getVar('format', 'html'))
 {
 $route .= '.'.$format;
 $uri->delVar('format');
 }
 }

 if($app->getCfg('sef_rewrite'))
 {
 //Transform the route
 $route = str_replace('index.php/', '', $route);
 }
	}

	//Add basepath to the uri
	$uri->setPath(JURI::base(true).'/'.$route);

	return $uri;
}

function _parseRawRoute(&$uri)

{

	$vars = array();

	$menu =& JSite::getMenu(true);

	//Handle an empty URL (special case)
	if(!$uri->getVar('Itemid') && !$uri->getVar('option'))
	{
 $item = $menu->getDefault();
 if(!is_object($item)) return $vars; // No default item set

 //Set the information in the request
 $vars = $item->query;

 //Get the itemid
 $vars['Itemid'] = $item->id;

 // Set the active menu item
 $menu->setActive($vars['Itemid']);

 return $vars;
	}

	//Get the variables from the uri
	$this->setVars($uri->getQuery(true));

	//Get the itemid, if it hasn't been set force it to null
	$this->setVar('Itemid', JRequest::getInt('Itemid', null));

	//Only an Itemid ? Get the full information from the itemid
	if(count($this->getVars()) == 1)
	{
 $item = $menu->getItem($this->getVar('Itemid'));
 if($item !== NULL && is_array($item->query)) {
 $vars = $vars + $item->query;
 }
	}

	// Set the active menu item
	$menu->setActive($this->getVar('Itemid'));

	return $vars;
}

function _parseSefRoute(&$uri)

{

	$vars = array();

	$menu =& JSite::getMenu(true);
	$route = $uri->getPath();

	//Get the variables from the uri
	$vars = $uri->getQuery(true);

	//Handle an empty URL (special case)
	if(empty($route))
	{

 //If route is empty AND option is set in the query, assume it's non-sef url, and parse apropriately
 if(isset($vars['option']) || isset($vars['Itemid'])) {
 return $this->_parseRawRoute($uri);
 }

 $item = $menu->getDefault();

 //Set the information in the request
 $vars = $item->query;

 //Get the itemid
 $vars['Itemid'] = $item->id;

 // Set the active menu item
 $menu->setActive($vars['Itemid']);

 return $vars;
	}

	/*
 * Parse the application route
 */

	if(substr($route, 0, 9) == 'component')
	{
 $segments	= explode('/', $route);
 $route = str_replace('component/'.$segments[1], '', $route);

 $vars['option'] = 'com_'.$segments[1];
 $vars['Itemid'] = null;
	}
	else
	{
 //Need to reverse the array (highest sublevels first)
 $items = array_reverse($menu->getMenu());

 foreach ($items as $item)
 {
 $lenght = strlen($item->route); //get the lenght of the route

 if($lenght > 0 && strpos($route.'/', $item->route.'/') === 0 && $item->type != 'menulink')
 {
 $route = substr($route, $lenght);

 $vars['Itemid'] = $item->id;
 $vars['option'] = $item->component;
 break;
 }
 }
	}

	// Set the active menu item
	if ( isset($vars['Itemid']) ) {
 $menu->setActive( $vars['Itemid'] );
	}

	//Set the variables
	$this->setVars($vars);

	/*
 * Parse the component route
 */
	if(!empty($route) && isset($this->_vars['option']) )
	{
 $segments = explode('/', $route);
 array_shift($segments);

 // Handle component	route
 $component = preg_replace('/[^A-Z0-9_\.-]/i', '', $this->_vars['option']);

 // Use the component routing handler if it exists
 $path = JPATH_SITE.DS.'components'.DS.$component.DS.'router.php';

 if (file_exists($path) && count($segments))
 {
 if ($component != "com_search") { // Cheap fix on searches
 //decode the route segments
 $segments = $this->_decodeSegments($segments);
 }
 else { // fix up search for URL
 $total = count($segments);
 for($i=0; $i<$total; $i++) {
 // urldecode twice because it is encoded twice
 $segments[$i] = urldecode(urldecode(stripcslashes($segments[$i])));
 }
 }

 require_once $path;
 $function = substr($component, 4).'ParseRoute';
 $vars = $function($segments);

 $this->setVars($vars);
 }
	}
	else
	{
 //Set active menu item
 if($item =& $menu->getActive()) {
 $vars = $item->query;
 }
	}

	return $vars;
}

function _buildRawRoute(&$uri)

{
}

function _buildSefRoute(&$uri)
{
// Get the route

	$route = $uri->getPath();

	// Get the query data
	$query = $uri->getQuery(true);

	if(!isset($query['option'])) {
 return;
	}

	$menu =& JSite::getMenu();

	/*
 * Build the component route
 */
	$component	= preg_replace('/[^A-Z0-9_\.-]/i', '', $query['option']);
	$tmp = '';

	// Use the component routing handler if it exists
	$path = JPATH_SITE.DS.'components'.DS.$component.DS.'router.php';

	// Use the custom routing handler if it exists
	if (file_exists($path) && !empty($query))
	{
 require_once $path;
 $function	= substr($component, 4).'BuildRoute';
 $parts = $function($query);

 // encode the route segments
 if ($component != "com_search") { // Cheep fix on searches
 $parts = $this->_encodeSegments($parts);
 }
 else { // fix up search for URL
 $total = count($parts);
 for($i=0; $i<$total; $i++) {
 // urlencode twice because it is decoded once after redirect
 $parts[$i] = urlencode(urlencode(stripcslashes($parts[$i])));
 }
 }

 $result = implode('/', $parts);
 $tmp	= ($result != "") ? '/'.$result : '';
	}

	/*
 * Build the application route
 */
	$built = false;
	if (isset($query['Itemid']) && !empty($query['Itemid']))
	{
 $item = $menu->getItem($query['Itemid']);

 if (is_object($item) && $query['option'] == $item->component) {
 $tmp = !empty($tmp) ? $item->route.'/'.$tmp : $item->route;
 $built = true;
 }
	}

	if(!$built) {
 $tmp = 'component/'.substr($query['option'], 4).'/'.$tmp;
	}

	$route .= '/'.$tmp;

	// Unset unneeded query information
	unset($query['Itemid']);
	unset($query['option']);

	//Set query again in the URI
	$uri->setQuery($query);
	$uri->setPath($route);
}

function _processParseRules(&$uri)

{
// Process the attached parse rules

	$vars = parent::_processParseRules($uri);

	// Process the pagination support
	if($this->_mode == JROUTER_MODE_SEF)
	{
 $app =& JFactory::getApplication();

 if($start = $uri->getVar('start'))
 {
 $uri->delVar('start');
 $vars['limitstart'] = $start;
 }
	}

	return $vars;
}

function _processBuildRules(&$uri)

{
// Make sure any menu vars are used if no others are specified

	if(($this->_mode != JROUTER_MODE_SEF) && $uri->getVar('Itemid') && count($uri->getQuery(true)) == 2)
	{
 $menu =& JSite::getMenu();

 // Get the active menu item
 $itemid = $uri->getVar('Itemid');
 $item = $menu->getItem($itemid);

 $uri->setQuery($item->query);
 $uri->setVar('Itemid', $itemid);
	}

	// Process the attached build rules
	parent::_processBuildRules($uri);

	// Get the path data
	$route = $uri->getPath();

	if($this->_mode == JROUTER_MODE_SEF && $route)
	{
 $app =& JFactory::getApplication();

 if ($limitstart = $uri->getVar('limitstart'))
 {
 $uri->setVar('start', (int) $limitstart);
 $uri->delVar('limitstart');
 }
	}

	$uri->setPath($route);
}

function &_createURI($url)
{
//Create the URI

	$uri =& parent::_createURI($url);

	// Set URI defaults
	$menu =& JSite::getMenu();

	// Get the itemid form the URI
	$itemid = $uri->getVar('Itemid');

	if(is_null($itemid))
	{
 if($option = $uri->getVar('option'))
 {
 $item = $menu->getItem($this->getVar('Itemid'));
 if(isset($item) && $item->component == $option) {
 $uri->setVar('Itemid', $item->id);
 }
 }
 else
 {
 if($option = $this->getVar('option')) {
 $uri->setVar('option', $option);
 }

 if($itemid = $this->getVar('Itemid')) {
 $uri->setVar('Itemid', $itemid);
 }
 }
	}
	else
	{
 if(!$uri->getVar('option'))
 {
 $item = $menu->getItem($itemid);
 $uri->setVar('option', $item->component);
 }
	}

	return $uri;
}
}