Makes blob spores/blobbers and mice GC properly (#17237)

code/game/gamemodes/blob/blobs/factory.dm

@@ -24,6 +24,4 @@
 	spore_delay = world.time + 100 // 10 seconds
 	var/mob/living/simple_animal/hostile/blob/blobspore/BS = new/mob/living/simple_animal/hostile/blob/blobspore(src.loc, src)
 	if(overmind)
-		BS.color = overmind.blob_reagent_datum?.complementary_color
-		BS.overmind = overmind
-		overmind.blob_mobs.Add(BS)
+		overmind.add_mob_to_overmind(BS)

code/game/gamemodes/blob/overmind.dm

@@ -77,6 +77,15 @@
 
 	blob_talk(message)
 
+/mob/camera/blob/proc/add_mob_to_overmind(mob/living/simple_animal/hostile/blob/B)
+	B.color = blob_reagent_datum?.complementary_color
+	B.overmind = src
+	blob_mobs += B
+	RegisterSignal(B, COMSIG_PARENT_QDELETING, .proc/on_blob_mob_death)
+
+/mob/camera/blob/proc/on_blob_mob_death(mob/living/simple_animal/hostile/blob/B)
+	blob_mobs -= B
+
 /mob/camera/blob/proc/blob_talk(message)
 	log_say("(BLOB) [message]", src)
 

code/game/gamemodes/blob/powers.dm

@@ -231,9 +231,7 @@
 	var/mob/living/simple_animal/hostile/blob/blobbernaut/blobber = new /mob/living/simple_animal/hostile/blob/blobbernaut (get_turf(B))
 	if(blobber)
 		qdel(B)
-	blobber.color = blob_reagent_datum.complementary_color
-	blobber.overmind = src
-	blob_mobs.Add(blobber)
+	add_mob_to_overmind(blobber)
 	blobber.AIStatus = AI_OFF
 	blobber.LoseTarget()
 	spawn()

code/modules/mob/living/simple_animal/friendly/mouse.dm

@@ -212,9 +212,9 @@
 	var/datum/mind/blobmind = mind
 	var/client/C = client
 	if(istype(blobmind) && istype(C))
-		blobmind.special_role = SPECIAL_ROLE_BLOB
 		var/obj/structure/blob/core/core = new(T, C, 3)
 		core.lateblobtimer()
+		qdel(blobmind) // Delete the old mind. THe blob will make a new one
 	else
 		new /obj/structure/blob/core(T) // Ghosts will be prompted to control it.
 	if(ismob(loc)) // in case some taj/etc ate the mouse.