Merge pull request #10238 from Ghommie/Ghommie-cit478

Brings in some mapping code updates.

code/game/turfs/simulated/floor/plating.dm

@@ -11,7 +11,7 @@
 	name = "plating"
 	icon_state = "plating"
 	intact = FALSE
-	baseturfs = /turf/open/space
+	baseturfs = /turf/baseturf_bottom
 	footstep = FOOTSTEP_PLATING
 	barefootstep = FOOTSTEP_HARD_BAREFOOT
 	clawfootstep = FOOTSTEP_HARD_CLAW

code/game/turfs/simulated/floor/plating/asteroid.dm

@@ -76,11 +76,6 @@
 			for(var/obj/item/stack/ore/O in src)
 				SEND_SIGNAL(W, COMSIG_PARENT_ATTACKBY, O)
 
-/turf/open/floor/plating/asteroid/singularity_act()
-	if(is_planet_level(z))
-		return ..()
-	ScrapeAway()
-
 /turf/open/floor/plating/asteroid/ex_act(severity, target)
 	. = SEND_SIGNAL(src, COMSIG_ATOM_EX_ACT, severity, target)
 	contents_explosion(severity, target)
@@ -132,6 +127,7 @@
 
 /turf/open/floor/plating/asteroid/airless
 	initial_gas_mix = AIRLESS_ATMOS
+	baseturfs = /turf/open/floor/plating/asteroid/airless
 	turf_type = /turf/open/floor/plating/asteroid/airless