Runtime fix: getFlatIcon() - Will no longer runtime should overlays contain any nulls. (Interesting note: I was intending to fix this to try speed up update_icons() even more but it turns out BYOND really dislikes overlays += null. the optimisation took twice as long o.O)

Removed unused caching code from getFlatIcon(). We handle our own caching using datacore.dm

Runtime fix: datacore wasn't checking the type of object in the wear_id inventory slot. I've removed that so it now uses mind.assigned_role instead.
The following runtime has occured 1 time(s).
runtime error: undefined variable /obj/item/device/pda/warden/var/assignment
proc name: manifest (/obj/effect/datacore/proc/manifest)
  source file: datacore.dm,14
  usr: null
  src: the datacore (/obj/effect/datacore)

Runtime fix: staff-of-change projectiles were runtiminng when transforming somebody with implants. Cause: forgot a "continue" >.<
The following runtime has occured 4 time(s).
runtime error: Cannot modify null.layer.
proc name: wabbajack (/obj/item/projectile/change/proc/wabbajack)
  source file: change.dm,37
  usr: 0
  src: the bolt of change (/obj/item/projectile/change)



git-svn-id: http://tgstation13.googlecode.com/svn/trunk@4412 316c924e-a436-60f5-8080-3fe189b3f50e

code/modules/projectiles/projectile/change.dm

@@ -26,6 +26,7 @@
 			for(var/obj/item/W in M)
 				if(istype(W, /obj/item/weapon/implant))	//TODO: Carn. give implants a dropped() or something
 					del(W)
+					continue
 				W.layer = initial(W.layer)
 				W.loc = M.loc
 				W.dropped(M)