# HG changeset patch
# User frosch
# Date 1212797196 0
# Node ID cd5463104792ab1e74fa6ea40fd9b4652f21d02f
# Parent  4cc81b7cf711edd69aaf01b305e0c3ac6949fb94
(svn r13397) -Fix: Do not crash when resolving vehicle sprite groups with zero sprites.

diff -r 4cc81b7cf711 -r cd5463104792 src/newgrf_engine.cpp
--- a/src/newgrf_engine.cpp	Fri Jun 06 19:27:09 2008 +0000
+++ b/src/newgrf_engine.cpp	Sat Jun 07 00:06:36 2008 +0000
@@ -880,7 +880,7 @@
 	NewVehicleResolver(&object, engine, v);
 
 	group = Resolve(GetVehicleSpriteGroup(engine, v), &object);
-	if (group == NULL || group->type != SGT_RESULT) return 0;
+	if (group == NULL || group->type != SGT_RESULT || group->g.result.num_sprites == 0) return 0;
 
 	return group->g.result.sprite + (direction % group->g.result.num_sprites);
 }
@@ -903,7 +903,7 @@
 	const SpriteGroup *group = GetWagonOverrideSpriteSet(engine, CT_DEFAULT, engine);
 	group = Resolve(group, &object);
 
-	if (group == NULL || group->type != SGT_RESULT) return 0;
+	if (group == NULL || group->type != SGT_RESULT || group->g.result.num_sprites == 0) return 0;
 
 	if (v == NULL) return group->g.result.sprite;