# HG changeset patch
# User tron
# Date 1108655627 0
# Node ID 23d4f642c989ff9d08ff5626a2e8dec0fa1613af
# Parent  7ab329d1fc280a52e3d78abfe9968b51af017249
(svn r1882) Add a basic check if a non-existent sprite gets accessed.
Now ottd bails out with an error message instead of segfaulting.
This is far from perfect, some checks after loading a savegame should be added.

diff -r 7ab329d1fc28 -r 23d4f642c989 spritecache.c
--- a/spritecache.c	Thu Feb 17 10:56:19 2005 +0000
+++ b/spritecache.c	Thu Feb 17 15:53:47 2005 +0000
@@ -154,6 +154,14 @@
 	byte type;
 	byte* dest;
 
+	if (_sprite_file_pos[id] == 0) {
+		error(
+			"Tried to load non-existing sprite #%d.\n"
+			"Probable cause: Wrong/missing NewGRFs",
+			id
+		);
+	}
+
 	FioSeekToFile(_sprite_file_pos[id]);
 
 	type = FioReadByte();