From a163c2b1b344d44ba32cc33383c5dc12cbc85a10 Mon Sep 17 00:00:00 2001
From: Tomas Dittmann <chaosmeist3r@gmail.com>
Date: Sun, 9 Jul 2017 20:05:27 +0200
Subject: [PATCH] prevent crash with hacked spiral slides

---
 src/openrct2/ride/ride.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/openrct2/ride/ride.c b/src/openrct2/ride/ride.c
index 9c18d4d9c3..71320eec9d 100644
--- a/src/openrct2/ride/ride.c
+++ b/src/openrct2/ride/ride.c
@@ -2202,6 +2202,9 @@ static void ride_spiral_slide_update(rct_ride *ride)
         sint32 y = ride->station_starts[i] >> 8;
 
         rct_map_element *mapElement = ride_get_station_start_track_element(ride, i);
+        if (mapElement == NULL)
+            return;
+
         sint32 rotation = map_element_get_direction(mapElement);
         x *= 32;
         y *= 32;