Add necessary skrell headpocket functions

code/modules/surgery/organs/subtypes/skrell.dm

@@ -1,3 +1,5 @@
+#define HEADPOCKET_DAMAGE_THRESHOLD 8
+
 /obj/item/organ/internal/liver/skrell
 	alcohol_intensity = 4
 	species = "Skrell"
@@ -13,6 +15,7 @@
 	species = "Skrell"
 	actions_types = list(/datum/action/item_action/organ_action/toggle)
 	var/obj/item/weapon/storage/internal/pocket
+	var/head_damage = 0
 
 /obj/item/organ/internal/headpocket/New()
 	..()
@@ -23,8 +26,26 @@
 	// Fit only pocket sized items
 	pocket.max_w_class = 2
 	pocket.max_combined_w_class = 2
+
+/obj/item/organ/internal/headpocket/on_life()
 	..()
+	var/obj/item/organ/external/head/head = owner.get_organ("head")
+	if(pocket.contents.len &&	(head.brute_dam - head_damage >= HEADPOCKET_DAMAGE_THRESHOLD ||	!findtextEx(head.h_style, "Tentacles")))
+		owner.visible_message("<span class='notice'>Something falls from [owner]'s head!</span>",
+													"<span class='notice'>Something falls from your head!</span>")
+		pocket.empty_object_contents(0, get_turf(owner))
+	head_damage = head.brute_dam
 
 /obj/item/organ/internal/headpocket/ui_action_click()
+	if(!loc)
+		loc = owner
 	pocket.MouseDrop(owner)
-	return
+
+/obj/item/organ/internal/headpocket/on_owner_death()
+	pocket.empty_object_contents(0, get_turf(owner))
+
+/obj/item/organ/internal/headpocket/remove()
+	pocket.empty_object_contents(0, get_turf(owner))
+	. = ..()
+
+#undef HEADPOCKET_DAMAGE_THRESHOLD