From 480c1bd9e0b9bf9447513547d907908184ed2578 Mon Sep 17 00:00:00 2001
From: yexo <yexo@openttd.org>
Date: Sun, 1 May 2011 21:02:18 +0000
Subject: [PATCH] (svn r22409) -Fix: [NewGRF] make sure the action2 ID of a
 generic feature callback is valid

---
 src/newgrf.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/newgrf.cpp b/src/newgrf.cpp
index 4a14381e42..85d9a7ef8a 100644
--- a/src/newgrf.cpp
+++ b/src/newgrf.cpp
@@ -4565,6 +4565,7 @@ static void FeatureMapSpriteGroup(ByteReader *buf)
 		/* Skip number of cargo ids? */
 		buf->ReadByte();
 		uint16 groupid = buf->ReadWord();
+		if (!IsValidGroupID(groupid, "FeatureMapSpriteGroup")) return;
 
 		grfmsg(6, "FeatureMapSpriteGroup: Adding generic feature callback for feature %d", feature);