if zoom hasnt changed, use PanToLatLong() instead of setCenter()

git-svn-id: http://svn.openlayers.org/trunk/openlayers@1231 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Layer/VirtualEarth.js

@@ -41,12 +41,17 @@ OpenLayers.Layer.VirtualEarth.prototype =
 
         if (this.vemap != null) {
             var olCenter = this.map.getCenter();
-            var olZoom = this.map.getZoom();
-    
             var veCenter = this.getVELatLongFromOLLonLat(olCenter);
-            var veZoom = this.getVEZoomFromOLZoom(olZoom);
     
-            this.vemap.SetCenterAndZoom(veCenter, veZoom);
+            if (zoomChanged) {
+                var olZoom = this.map.getZoom();
+                var veZoom = this.getVEZoomFromOLZoom(olZoom);
+    
+                this.vemap.SetCenterAndZoom(veCenter, veZoom);
+            } else {
+                this.vemap.PanToLatLong(veCenter);
+            }
+    
         }
     },
 
@@ -55,6 +60,7 @@ OpenLayers.Layer.VirtualEarth.prototype =
      * 
      */
     loadVEMap:function() {
+
         // create div and set to same size as map
         var veDiv = OpenLayers.Util.createDiv(this.name);
         var sz = this.map.getSize();