Don't dispatch a "load" event for blocked frames on Safari

safari/ext/content.js

Index: safari/ext/content.js
===================================================================
--- a/safari/ext/content.js
+++ b/safari/ext/content.js
@@ -328,12 +328,15 @@
     {
       event.preventDefault();
 
-      // Safari doesn't dispatch an "error" or "load" event when preventing an
-      // element from loading by cancelling the "beforeload" event. So we have
-      // to dispatch it manually. Otherwise element collapsing wouldn't work.
-      var evt = document.createEvent("Event");
-      evt.initEvent(type == "sub_frame" ? "load" : "error");
-      event.target.dispatchEvent(evt);
+      // Safari doesn't dispatch an "error" event when preventing an element
+      // from loading by cancelling the "beforeload" event. So we have to
+      // dispatch it manually. Otherwise element collapsing wouldn't work.
+      if (type != "sub_frame")
+      {
+        var evt = document.createEvent("Event");
+        evt.initEvent("error");
+        event.target.dispatchEvent(evt);
+      }
     }
   }, true);