Makes the station Z level into a list instead of a single define

code/modules/mining/aux_base_camera.dm

@@ -151,8 +151,7 @@
 		to_chat(owner, "<span class='warning'>You can only build within the mining base!</span>")
 		return FALSE
 
-
-	if(build_target.z != ZLEVEL_STATION)
+	if(!(build_target.z in GLOB.station_z_levels))
 		to_chat(owner, "<span class='warning'>The mining base has launched and can no longer be modified.</span>")
 		return FALSE