Fix Bookmark* autocommand events.

Struct now only offers values during iteration like Array.

common/content/bookmarks.js

@@ -16,12 +16,12 @@ var Bookmarks = Module("bookmarks", {
         storage.addObserver("bookmark-cache", function (key, event, arg) {
             if (["add", "change", "remove"].indexOf(event) >= 0)
                 autocommands.trigger("Bookmark" + util.capitalize(event),
-                     iter({
+                     update({
                          bookmark: {
                              toString: function () "bookmarkcache.bookmarks[" + arg.id + "]",
                              valueOf: function () arg
                          }
-                     }, arg).toObject());
+                     }, arg.toObject()));
             bookmarks.timer.tell();
         }, window);
     },