Merge pull request #5496 from Citadel-Station-13/upstream-merge-35339

[MIRROR] Support stations with multiple z-levels

code/modules/events/pirates.dm

@@ -60,7 +60,7 @@
 	var/datum/map_template/pirate_event_ship/ship = new
 	var/x = rand(TRANSITIONEDGE,world.maxx - TRANSITIONEDGE - ship.width)
 	var/y = rand(TRANSITIONEDGE,world.maxy - TRANSITIONEDGE - ship.height)
-	var/z = ZLEVEL_EMPTY_SPACE
+	var/z = SSmapping.empty_space.z_value
 	var/turf/T = locate(x,y,z)
 	if(!T)
 		CRASH("Pirate event found no turf to load in")