Fix #432: Fix false positive warning in CheckCaches with very old saves

src/openttd.cpp

@@ -1600,7 +1600,7 @@ void CheckCaches(bool force_check, std::function<void(const char *)> log, CheckC
 				if (u->IsGroundVehicle() && (HasBit(u->GetGroundVehicleFlags(), GVF_GOINGUP_BIT) || HasBit(u->GetGroundVehicleFlags(), GVF_GOINGDOWN_BIT)) && u->GetGroundVehicleCache()->cached_slope_resistance && HasBit(v->vcache.cached_veh_flags, VCF_GV_ZERO_SLOPE_RESIST)) {
 					CCLOGV("VCF_GV_ZERO_SLOPE_RESIST set incorrectly (1)");
 				}
-				if (u->type == VEH_TRAIN && u->breakdown_ctr != 0 && !HasBit(Train::From(v)->flags, VRF_CONSIST_BREAKDOWN)) {
+				if (u->type == VEH_TRAIN && u->breakdown_ctr != 0 && !HasBit(Train::From(v)->flags, VRF_CONSIST_BREAKDOWN) && (Train::From(u)->IsEngine() || Train::From(u)->IsMultiheaded())) {
 					CCLOGV("VRF_CONSIST_BREAKDOWN incorrectly not set");
 				}
 				if (u->type == VEH_TRAIN && ((Train::From(u)->track & TRACK_BIT_WORMHOLE && !(Train::From(u)->vehstatus & VS_HIDDEN)) || Train::From(u)->track == TRACK_BIT_DEPOT) && !HasBit(Train::From(v)->flags, VRF_CONSIST_SPEED_REDUCTION)) {