Makes has_brain_worms cheaper

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

@@ -19,6 +19,10 @@
 /mob/living/carbon/Destroy()
 	QDEL_LIST(internal_organs)
 	QDEL_LIST(stomach_contents)
+	var/mob/living/simple_animal/borer/B = has_brain_worms()
+	if(B)
+		B.leave_host()
+		qdel(B)
 	remove_from_all_data_huds()
 	return ..()
 

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

@@ -14,6 +14,8 @@
 	var/obj/item/head = null
 	var/obj/item/clothing/suit/wear_suit = null		//TODO: necessary? Are they even used? ~Carn
 
+	var/mob/living/simple_animal/borer/borer = null
+
 	//Active emote/pose
 	var/pose = null