--- a/vehicle.c	Sat Mar 18 15:29:24 2006 +0000
+++ b/vehicle.c	Sat Mar 18 15:31:34 2006 +0000
@@ -689,7 +689,7 @@
 bool CanRefitTo(EngineID engine_type, CargoID cid_to)
 {
 	CargoID cid = _global_cargo_id[_opt_ptr->landscape][cid_to];
-	return HASBIT(_engine_info[engine_type].refit_mask, cid) != 0;
+	return HASBIT(_engine_info[engine_type].refit_mask, cid);
 }
 
 static void DoDrawVehicle(const Vehicle *v)