Ticket #1346: destroy_once.patch

lib/OpenLayers/Control.js

@@ -165 +165 @@
-     * to prevent memory leaks.
-     */
-    destroy: function () {
+        // Only destroy once.
+        if (this.events == null) {
+            return;
+        }    
-        this.events.destroy();
-        this.events = null;
+        
-        // eliminate circular references
-        if (this.handler) {
-            this.handler.destroy();