# HG changeset patch
# User glx22 <glx22@users.noreply.github.com>
# Date 2019-03-30 21:12:25
# Node ID b1a6d3e60ba849b2f4c80d0dd2aa580d27a3e4fa
# Parent  429c76c0dfda00d8dd8e4cd8ee8f143ec83c9b01

Fix #7433: don't use AirportSpec substitute if it's not set (#7435)

diff --git a/src/newgrf_airport.cpp b/src/newgrf_airport.cpp
--- a/src/newgrf_airport.cpp
+++ b/src/newgrf_airport.cpp
@@ -100,6 +100,7 @@ AirportSpec AirportSpec::specs[NUM_AIRPO
 	assert(type < lengthof(AirportSpec::specs));
 	const AirportSpec *as = &AirportSpec::specs[type];
 	if (type >= NEW_AIRPORT_OFFSET && !as->enabled) {
+		if (_airport_mngr.GetGRFID(type) == 0) return as;
 		byte subst_id = _airport_mngr.GetSubstituteID(type);
 		if (subst_id == AT_INVALID) return as;
 		as = &AirportSpec::specs[subst_id];