use new offset() function

git-svn-id: http://svn.openlayers.org/trunk/openlayers@459 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Popup/Anchored.js

@@ -110,7 +110,7 @@ OpenLayers.Popup.Anchored.prototype =
         var newPx = px.copyOf();
 
         //adjust for offset
-        newPx.add(this.anchor.offset.x, this.anchor.offset.y);
+        newPx.offset(this.anchor.offset);
         
 
         var top = (this.relativePosition.charAt(0) == 't');