Merge pull request #10455 from Ghommie/Ghommie-cit501

Porting some runtime fixes.

code/modules/mob/living/simple_animal/bot/mulebot.dm

@@ -151,7 +151,8 @@
 	return
 
 /mob/living/simple_animal/bot/mulebot/bullet_act(obj/item/projectile/Proj)
-	if(..())
+	. = ..()
+	if(. && !QDELETED(src)) //Got hit and not blown up yet.
 		if(prob(50) && !isnull(load))
 			unload(0)
 		if(prob(25))

code/modules/mob/living/simple_animal/hostile/mining_mobs/elites/elite.dm

@@ -240,7 +240,8 @@ obj/structure/elite_tumor/proc/return_elite()
 	INVOKE_ASYNC(src, .proc/fighters_check)  //Checks to see if our fighters died.
 	INVOKE_ASYNC(src, .proc/arena_trap)  //Gets another arena trap queued up for when this one runs out.
 	INVOKE_ASYNC(src, .proc/border_check)  //Checks to see if our fighters got out of the arena somehow.
-	addtimer(CALLBACK(src, .proc/arena_checks), 50)
+	if(!QDELETED(src))
+		addtimer(CALLBACK(src, .proc/arena_checks), 50)
 
 /obj/structure/elite_tumor/proc/fighters_check()
 	if(activator != null && activator.stat == DEAD || activity == TUMOR_ACTIVE && QDELETED(activator))