Merge pull request #52231 from ShizCalev/cult-rune-reveal-fix

Fixes cultist reveal rune ability breaking when used over a cult engine turf without a fake appearance.

code/game/turfs/open/floor/reinf_floor.dm

@@ -148,8 +148,7 @@
 	return ..()
 
 /turf/open/floor/engine/cult/proc/be_removed()
-	qdel(realappearance)
-	realappearance = null
+	QDEL_NULL(realappearance)
 
 /turf/open/floor/engine/cult/airless
 	initial_gas_mix = AIRLESS_ATMOS

code/modules/antagonists/cult/blood_magic.dm

@@ -294,6 +294,8 @@
 		for(var/obj/structure/destructible/cult/S in range(5,owner))
 			S.conceal()
 		for(var/turf/open/floor/engine/cult/T  in range(5,owner))
+			if(!T.realappearance)
+				continue
 			T.realappearance.alpha = 0
 		for(var/obj/machinery/door/airlock/cult/AL in range(5, owner))
 			AL.conceal()
@@ -311,6 +313,8 @@
 		for(var/obj/structure/destructible/cult/S in range(6,owner))
 			S.reveal()
 		for(var/turf/open/floor/engine/cult/T  in range(6,owner))
+			if(!T.realappearance)
+				continue
 			T.realappearance.alpha = initial(T.realappearance.alpha)
 		for(var/obj/machinery/door/airlock/cult/AL in range(6, owner))
 			AL.reveal()