(svn r9818) -Codechange: Cache wagon override sprite set whenever consist is changed, instead of 'recalculating' it every time it is used or just tested.

src/train_cmd.cpp

@@ -166,6 +166,9 @@ void TrainConsistChanged(Vehicle* v)
 
 		if (IsTrainEngine(u)) first_engine = u->engine_type;
 
+		/* Cache wagon override sprite group. NULL is returned if there is none */
+		u->u.rail.cached_override = GetWagonOverrideSpriteSet(u->engine_type, u->cargo_type, u->u.rail.first_engine);
+
 		if (rvi_u->visual_effect != 0) {
 			u->u.rail.cached_vis_effect = rvi_u->visual_effect;
 		} else {