Vehicles hear exterior audio (#36)

code/controllers/subsystem/interior.dm

@@ -42,7 +42,7 @@ SUBSYSTEM_DEF(interior)
 			continue
 		if(x >= bounds[1].x && x <= bounds[2].x && y >= bounds[1].y && y <= bounds[2].y)
 			return current_interior
-	return FALSE
+	return null
 
 /// Checks if an atom is in an interior
 /datum/controller/subsystem/interior/proc/in_interior(loc)
@@ -51,7 +51,7 @@ SUBSYSTEM_DEF(interior)
 	if(!isturf(loc))
 		loc = get_turf(loc)
 
-	var/datum/turf_reservation/interior/reservation = SSmapping.used_turfs[loc]
+	var/datum/weakref/reservation = SSmapping.used_turfs[loc]
 
 	if(!istype(reservation))
 		return FALSE

code/controllers/subsystem/sound.dm

@@ -41,5 +41,5 @@ SUBSYSTEM_DEF(sound)
 			if(VI?.ready)
 				var/list/bounds = VI.get_middle_coords()
 				if(bounds.len >= 2)
-					hearers |= SSquadtree.players_in_range(RECT(bounds[1], bounds[2], VI.map_template.height, VI.map_template.width), bounds[3])
+					hearers |= SSquadtree.players_in_range(RECT(bounds[1], bounds[2], VI.map_template.width, VI.map_template.height), bounds[3])
 	template_queue[template] = hearers

code/modules/vehicles/interior/interior.dm

@@ -318,7 +318,7 @@
 	var/turf/min = reservation.bottom_left_coords
 	var/turf/max = reservation.top_right_coords
 
-	return list(Floor(min[1] + (max[1] - min[1])), Floor(min[2] + (max[2] - min[2])), min[3])
+	return list(Floor(min[1] + (max[1] - min[1])/2), Floor(min[2] + (max[2] - min[2])/2), min[3])
 
 /datum/interior/proc/get_middle_turf()
 	var/list/turf/bounds = get_bound_turfs()