Fix temperature issues in caves

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

@@ -159,6 +159,9 @@
 
 	data_having_type = /turf/simulated/floor/plating/asteroid/airless/cave/volcanic/has_data
 	turf_type = /turf/simulated/floor/plating/asteroid/basalt/lava_land_surface
+	oxygen = 14
+	nitrogen = 23
+	temperature = 300
 
 /turf/simulated/floor/plating/asteroid/airless/cave/volcanic/has_data //subtype for producing a tunnel with given data
 	has_data = TRUE
@@ -249,7 +252,7 @@
 	SpawnFlora(T)
 
 	SpawnMonster(T)
-	T.ChangeTurf(turf_type,FALSE,FALSE)
+	T.ChangeTurf(turf_type,FALSE,FALSE,TRUE)
 
 /turf/simulated/floor/plating/asteroid/airless/cave/proc/SpawnMonster(turf/T)
 	if(prob(30))

code/game/turfs/turf.dm

@@ -174,7 +174,7 @@
 	return ChangeTurf(path)
 
 //Creates a new turf
-/turf/proc/ChangeTurf(path, defer_change = FALSE, keep_icon = TRUE)
+/turf/proc/ChangeTurf(path, defer_change = FALSE, keep_icon = TRUE, ignore_air = FALSE)
 	if(!path)
 		return
 	if(!use_preloader && path == type) // Don't no-op if the map loader requires it to be reconstructed
@@ -193,7 +193,7 @@
 		SSair.remove_from_active(src)
 	var/turf/W = new path(src)
 	if(!defer_change)
-		W.AfterChange()
+		W.AfterChange(ignore_air)
 
 	W.blueprint_data = old_blueprint_data