Bug 1096507 - [Wallpaper] Repeatedly tapping gallery, the screen does no...

...t load up images/blank
Hmm. I though you'd put this check in gallery.js where it calls activity.start. That way you wouldn't have to use the global variable here.  Or this module could track its own state and know if start had already been called.  (But note that I still like using the global for the rest of the app.)