Permanent brain exposure fix

A fix too the permanent brain exposure glitch, now brain exposure can be
fixed by setting the skull

code/modules/mob/living/carbon/human/human.dm

@@ -1480,6 +1480,14 @@
 		update_hair()
 		update_body()
 
+/mob/living/carbon/human/proc/unexpose_brain()
+	var/datum/organ/external/head/H = get_organ("head")
+	if(H)
+		H.brained=0
+		update_hair()
+		update_body()
+
+
 /mob/living/carbon/human/canSingulothPull(var/obj/machinery/singularity/singulo)
 	if(!..())
 		return 0
@@ -1665,4 +1673,4 @@
 	return threatcount
 
 /mob/living/carbon/human/canBeHandcuffed()
-	return 1
+	return 1

code/modules/mob/living/carbon/human/update_icons.dm

@@ -262,7 +262,7 @@ proc/get_damage_icon_part(damage_state, body_part)
 			var/datum/organ/external/head/head = part
 			if(head.brained==1)
 				brain_showing = 1
-
+			else brain_showing = 0
 
 		if(part.status & ORGAN_DESTROYED)
 			icon_key = "[icon_key]0"

code/modules/surgery/bones.dm

@@ -97,6 +97,7 @@
 		user.visible_message("\blue [user] sets [target]'s skull with \the [tool]." , \
 			"\blue You set [target]'s skull with \the [tool].")
 		affected.stage = 2
+		target.unexpose_brain()
 
 	fail_step(mob/living/user, mob/living/carbon/human/target, target_zone, obj/item/tool)
 		var/datum/organ/external/affected = target.get_organ(target_zone)