Fixes stands not dying with their user (tgstation#30402)

* We should probably make a rull that you shouldn qdel stulf you didn't make

* fixes stupid chasms

* I hope this works

* ()

* gahhh

* I still think that straight qdel things is going to cause more and more errors

* What the fuck

code/modules/mob/living/simple_animal/guardian/guardian.dm

@@ -129,7 +129,7 @@ GLOBAL_LIST_EMPTY(parasites) //all currently existing/living guardians
 	update_health_hud() //we need to update all of our health displays to match our summoner and we can't practically give the summoner a hook to do it
 	med_hud_set_health()
 	med_hud_set_status()
-	if(summoner)
+	if(!QDELETED(summoner))
 		if(summoner.stat == DEAD)
 			forceMove(summoner.loc)
 			to_chat(src, "<span class='danger'>Your summoner has died!</span>")