Add 'destroy' function to PanZoom control which unsets the 'map' item on all the buttons. This should prevent memory

leaks by removing the circular references to buttons.


git-svn-id: http://svn.openlayers.org/trunk/openlayers@24 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Control/PanZoom.js

@@ -113,5 +113,11 @@ OpenLayers.Control.PanZoom.prototype =
             case "zoomextents": this.map.zoomExtent(); break;
         }
         Event.stop(evt);
+    },
+    destroy: function() {
+        OpenLayers.Control.prototype.destroy.apply(this, arguments);
+        for(i=0; i<this.buttons.length; i++) {
+            this.buttons[i].map = null;
+        }
     }
 });