[Resolvido] Adicionar Marker no script do google maps

bom galera, o codigo abaixo abre certinho o mapa que eu preciso, perfeito, só tem um problema o mapa está centralizado mas a 'marquinha , o icone rosa' nao aparece, alguem poderia me ajudar no que está faltando no codigo abaixo para eu poder colocar a marca da localizacao? obrigado

<script type="text/javascript" src="http://maps.googleapis.com/maps/api/js?sensor=false&libraries=places"></script>
<script type="text/javascript">

var map;
var latlng;
var lat;
var lng;
var centerChangedLast;
var CITY_MAP_CENTER_LAT = '-12.9125916';
var CITY_MAP_CENTER_LNG = '-38.3984960';
var CITY_MAP_ZOOMING_FACT='13';
if(CITY_MAP_CENTER_LAT=='')

var CITY_MAP_CENTER_LAT = 34;
}
if(CITY_MAP_CENTER_LNG=='')

var CITY_MAP_CENTER_LNG = 0;
}
if(CITY_MAP_CENTER_LAT!='' && CITY_MAP_CENTER_LNG!='' && CITY_MAP_ZOOMING_FACT!='')

var CITY_MAP_ZOOMING_FACT = 13;
}else if(CITY_MAP_ZOOMING_FACT!='')

var CITY_MAP_ZOOMING_FACT = 3;
}
 function initialize() {
 var latlng = new google.maps.LatLng(CITY_MAP_CENTER_LAT,CITY_MAP_CENTER_LNG);
 var myOptions = {
 zoom: CITY_MAP_ZOOMING_FACT,
 center: latlng,
 mapTypeId: google.maps.MapTypeId.ROADMAP };

 map = new google.maps.Map(document.getElementById("map_canvas"), myOptions);
google.maps.event.addListener(map, 'zoom_changed');
setupEvents();
 // centerChanged();
 }

google.maps.event.addDomListener(window, 'load', initialize);

/ ]]> /

</script>

<div id="map_canvas" style="height:350px; position:relative; width:450px;border:1px solid #4d4d4d;" class="form_row clearfix"></div>