* fix error of modalTrigger: 'loaded' event called twice times in some cases.

src/js/modal.trigger.js

@@ -237,7 +237,7 @@
                             $modal.callEvent('loaded' + ZUI_MODAL, {
                                 modalType: 'iframe',
                                 jQuery: frame$
-                            }, that);
+                            }, null);
 
                             setTimeout(ajustFrameSize, 100);