Bug 701804 - PageActions must be initialized before registering actions [r=mfinkle, a=javascript]

mobile/xul/chrome/content/PageActions.js

@@ -70,6 +70,7 @@ var PageActions = {
    * @param aThisObj (optional) scope object for aCallback
    */
   register: function register(aId, aCallback, aThisObj) {
+    this.init();
     this._handlers.push({id: aId, callback: aCallback, obj: aThisObj});
   },