Remove extra ?> in activity helper functions file

I just noticed an extra closing tag show up on my activities feed.

I finally tracked it down.
Merge pull request #1735 from hgtonight/patch-3

Remove extra ?> in activity helper functions file
Don't accept a UserID on profile post.
Merge branch 'master' of github.com:vanillaforums/Garden
Merge branch 'master' into stage

Conflicts:
	applications/dashboard/views/activity/helper_functions.php