Couple of bugfixes:

Wizards can no longer cast spells when muzzled. Fixes issue 843.

You can no longer take bags of holding or mechs to the clown planet. Fixes issue 1061.

Removed the infared sensor from the autolathe construct list. Fixes issue 1092.
- The infared sensor already does nothing, the code for it seems to have been removed ages ago, so there's no harm in doing this.
- Commenting out the define caused a few problems that I couldn't quite figure out. I'll leave it for now with a warning.

Removed the ability for pAI's to set arrest status. Dead players really shouldn't be allowed to grief people like that. Fixes issue 1093.

git-svn-id: http://tgstation13.googlecode.com/svn/trunk@5060 316c924e-a436-60f5-8080-3fe189b3f50e

code/datums/spell.dm

@@ -64,6 +64,11 @@ var/list/spells = typesof(/obj/effect/proc_holder/spell) //needed for the badmin
 		usr << "Not when you're incapacitated."
 		return 0
 
+	if(ishuman(usr) || ismonkey(usr))
+		if(istype(usr.wear_mask, /obj/item/clothing/mask/muzzle))
+			usr << "Mmmf mrrfff!"
+			return 0
+
 	if(clothes_req) //clothes check
 		if(!istype(usr, /mob/living/carbon/human))
 			usr << "You aren't a human, Why are you trying to cast a human spell, silly non-human? Casting human spells is for humans."