Fix for map destroy doesn't clean up all listeners r=tschaub (Closes #1301)

git-svn-id: http://svn.openlayers.org/trunk/openlayers@6108 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Map.js

@@ -373,8 +373,10 @@ OpenLayers.Map = OpenLayers.Class({
             // Else updateSize on catching the window's resize
             //  Note that this is ok, as updateSize() does nothing if the 
             //  map's size has not actually changed.
+            this.updateSizeDestroy = OpenLayers.Function.bind(this.updateSize, 
+                this);
             OpenLayers.Event.observe(window, 'resize',
-                            OpenLayers.Function.bind(this.updateSize, this));
+                            this.updateSizeDestroy);
         }
         
         // only append link stylesheet if the theme property is set
@@ -434,6 +436,14 @@ OpenLayers.Map = OpenLayers.Class({
      *     so that if map is manually destroyed, we can unregister this.
      */
     unloadDestroy: null,
+    
+    /**
+     * Method: updateSizeDestroy
+     * When the map is destroyed, we need to stop listening to updateSize
+     *    events: this method stores the function we need to unregister in 
+     *    non-IE browsers.
+     */
+    updateSizeDestroy: null,
 
     /**
      * APIMethod: destroy
@@ -449,6 +459,13 @@ OpenLayers.Map = OpenLayers.Class({
         OpenLayers.Event.stopObserving(window, 'unload', this.unloadDestroy);
         this.unloadDestroy = null;
 
+        if (this.updateSizeDestroy) {
+            OpenLayers.Event.stopObserving(window, 'resize', 
+                                           this.updateSizeDestroy);
+        } else {
+            this.events.unregister("resize", this, this.updateSize);
+        }    
+
         if (this.layers != null) {
             for (var i = this.layers.length - 1; i>=0; --i) {
                 //pass 'false' to destroy so that map wont try to set a new