Fixes lightswitch-turning-off mapping helper (tgstation#84399)

Fixes tgstation#84290

code/modules/mapping/mapping_helpers.dm

@@ -563,17 +563,17 @@
  if(!mapload)
  log_mapping("[src] spawned outside of mapload!")
  return INITIALIZE_HINT_QDEL
- check_validity()
- return INITIALIZE_HINT_QDEL
+ return INITIALIZE_HINT_LATELOAD
 
-/obj/effect/mapping_helpers/turn_off_lights_with_lightswitch/proc/check_validity()
+/obj/effect/mapping_helpers/turn_off_lights_with_lightswitch/LateInitialize()
  var/area/needed_area = get_area(src)
  if(!needed_area.lightswitch)
  stack_trace("[src] at [AREACOORD(src)] [(needed_area.type)] tried to turn lights off but they are already off!")
  var/obj/machinery/light_switch/light_switch = locate(/obj/machinery/light_switch) in needed_area
  if(!light_switch)
- stack_trace("Trying to turn off lights with lightswitch in area without lightswitches. In [(needed_area.type)] to be precise.")
- needed_area.lightswitch = FALSE
+ CRASH("Trying to turn off lights with lightswitch in area without lightswitches. In [(needed_area.type)] to be precise.")
+ light_switch.set_lights(FALSE)
+ qdel(src)
 
 //needs to do its thing before spawn_rivers() is called
 INITIALIZE_IMMEDIATE(/obj/effect/mapping_helpers/no_lava)