Making it so overlays at the top of the draw stack get the moveTo cal…

…l first (base layer still gets the first moveTo). p=mosesonline, r=me (closes #3230)

git-svn-id: http://svn.openlayers.org/trunk/openlayers@11848 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Map.js

@@ -1849,7 +1849,7 @@ OpenLayers.Map = OpenLayers.Class({
 
             bounds = this.baseLayer.getExtent();
 
-            for (var i=0, len=this.layers.length; i<len; i++) {
+            for (var i=this.layers.length-1; i>=0; --i) {
                 var layer = this.layers[i];
                 if (layer !== this.baseLayer && !layer.isBaseLayer) {
                     var inRange = layer.calculateInRange();