From c2929181c27beb2b62461abcb03098ef74a2c9c4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Micha=C5=82=20Janiszewski?= <janisozaur@gmail.com>
Date: Mon, 18 Jul 2016 19:17:55 +0200
Subject: [PATCH] Ensure validity of gActiveTrackDesign

---
 src/ride/track_design.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/ride/track_design.c b/src/ride/track_design.c
index 30434ecd79..2c134ceb14 100644
--- a/src/ride/track_design.c
+++ b/src/ride/track_design.c
@@ -1393,6 +1393,9 @@ static money32 place_track_design(sint16 x, sint16 y, sint16 z, uint8 flags, uin
 	}
 
 	rct_track_td6 *td6 = gActiveTrackDesign;
+	if (td6 == NULL) {
+		return MONEY32_UNDEFINED;
+	}
 	rct_object_entry *rideEntryObject = &td6->vehicle_object;
 
 	uint8 entryType, entryIndex;