Shotguns can now be equipped in the back slot. Does not work with combat shotgun.

git-svn-id: http://tgstation13.googlecode.com/svn/trunk@642 316c924e-a436-60f5-8080-3fe189b3f50e

code/defines/obj/weapon.dm

@@ -518,7 +518,7 @@
 	var/list/shells = list() //this is a list. All craftsmanship is of good quality. At least, it's better than two/eight vars, Uhangi! -- Barhandar
 	w_class = 3.0 //should go on back now, has no sprite for that atm because I can't sprite for shit -- Urist
 	force = 7.0
-	flags =  FPRINT | TABLEPASS | CONDUCT | USEDELAY
+	flags =  FPRINT | TABLEPASS | CONDUCT | USEDELAY | ONBACK
 	var/pumped = 0
 	shellsmax = 2