turns the baseturf var into a part time list (#33705)

code/game/turfs/open.dm

@@ -30,7 +30,7 @@
 	desc = "It's regarding you suspiciously."
 	icon = 'icons/turf/floors.dmi'
 	icon_state = "necro1"
-	baseturf = /turf/open/indestructible/necropolis
+	baseturfs = /turf/open/indestructible/necropolis
 	initial_gas_mix = LAVALAND_DEFAULT_ATMOS
 
 /turf/open/indestructible/necropolis/Initialize()
@@ -45,7 +45,7 @@
 	name = "necropolis floor"
 	icon = 'icons/turf/boss_floors.dmi'
 	icon_state = "boss"
-	baseturf = /turf/open/indestructible/boss
+	baseturfs = /turf/open/indestructible/boss
 	initial_gas_mix = LAVALAND_DEFAULT_ATMOS
 
 /turf/open/indestructible/boss/air
@@ -54,7 +54,7 @@
 /turf/open/indestructible/hierophant
 	icon = 'icons/turf/floors/hierophant_floor.dmi'
 	initial_gas_mix = LAVALAND_DEFAULT_ATMOS
-	baseturf = /turf/open/indestructible/hierophant
+	baseturfs = /turf/open/indestructible/hierophant
 	smooth = SMOOTH_TRUE
 
 /turf/open/indestructible/hierophant/two
@@ -71,7 +71,7 @@
 	name = "cogmetal"
 	desc = "Brass plating that gently radiates heat. For some reason, it reminds you of blood."
 	icon_state = "reebe"
-	baseturf = /turf/open/indestructible/clock_spawn_room
+	baseturfs = /turf/open/indestructible/clock_spawn_room
 
 /turf/open/indestructible/clock_spawn_room/Entered()
 	..()