fixing error when closing page in IE. Thanks bartvde for the testcase. r=bartvde (closes #3003)

git-svn-id: http://svn.openlayers.org/trunk/openlayers@11145 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Handler/Box.js

@@ -68,11 +68,11 @@ OpenLayers.Handler.Box = OpenLayers.Class(OpenLayers.Handler, {
      * Method: destroy
      */
     destroy: function() {
+        OpenLayers.Handler.prototype.destroy.apply(this, arguments);
         if (this.dragHandler) {
             this.dragHandler.destroy();
             this.dragHandler = null;
         }            
-        OpenLayers.Handler.prototype.destroy.apply(this, arguments);
     },
 
     /**