--- a/newgrf_engine.c	Fri Apr 28 07:14:22 2006 +0000
+++ b/newgrf_engine.c	Fri Apr 28 19:49:48 2006 +0000
@@ -405,7 +405,7 @@
 	return group;
 }
 
-int GetCustomEngineSprite(EngineID engine, const Vehicle* v, Direction direction)
+SpriteID GetCustomEngineSprite(EngineID engine, const Vehicle* v, Direction direction)
 {
 	const SpriteGroup *group;
 	const RealSpriteGroup *rsg;

--- a/newgrf_engine.h	Fri Apr 28 07:14:22 2006 +0000
+++ b/newgrf_engine.h	Fri Apr 28 19:49:48 2006 +0000
@@ -17,7 +17,7 @@
 void SetWagonOverrideSprites(EngineID engine, struct SpriteGroup *group, byte *train_id, int trains);
 void SetCustomEngineSprites(EngineID engine, byte cargo, struct SpriteGroup *group);
 // loaded is in percents, overriding_engine 0xffff is none
-int GetCustomEngineSprite(EngineID engine, const Vehicle* v, Direction direction);
+SpriteID GetCustomEngineSprite(EngineID engine, const Vehicle* v, Direction direction);
 
 void SetEngineGRF(EngineID engine, uint32 grfid);
 uint32 GetEngineGRFID(EngineID engine);