Improved a sanity check in the Bump proc of several mobs to fix issue 113 (formerly 1130) from Nov 2012: bumpable mobs can be bumped into a wall if a closet (including bodybags) is closed over them while pushing.  https://github.com/tgstation/-tg-station/issues/113
Merge pull request #432 from Rolan7/master

Issue 113 mob->closet->wall glitch fix.