Fix trains with non-front parts needing repair not being serviced

src/train.h

@@ -191,6 +191,8 @@ struct Train FINAL : public GroundVehicle<Train, VEH_TRAIN> {
 		int advisory_max_speed;
 	};
 
+	bool ConsistNeedsRepair() const;
+
 private:
 	MaxSpeedInfo GetCurrentMaxSpeedInfoInternal(bool update_state) const;
 

src/train_cmd.cpp

@@ -1201,6 +1201,16 @@ void Train::UpdateAcceleration()
 	}
 }
 
+bool Train::ConsistNeedsRepair() const
+{
+	if (!HasBit(this->flags, VRF_CONSIST_BREAKDOWN)) return false;
+
+	for (const Train *u = this; u != nullptr; u = u->Next()) {
+		if (HasBit(u->flags, VRF_NEED_REPAIR)) return true;
+	}
+	return false;
+}
+
 /**
  * Get the width of a train vehicle image in the GUI.
  * @param offset Additional offset for positioning the sprite; set to nullptr if not needed

src/vehicle.cpp

@@ -232,7 +232,7 @@ bool Vehicle::NeedsServicing() const
 	if ((this->ServiceIntervalIsPercent() ?
 			(this->reliability >= this->GetEngine()->reliability * (100 - this->service_interval) / 100) :
 			(this->date_of_last_service + this->service_interval >= _date))
-			&& !(this->type == VEH_TRAIN && HasBit(Train::From(this)->flags, VRF_NEED_REPAIR))
+			&& !(this->type == VEH_TRAIN && HasBit(Train::From(this)->flags, VRF_CONSIST_BREAKDOWN) && Train::From(this)->ConsistNeedsRepair())
 			&& !(this->type == VEH_ROAD && RoadVehicle::From(this)->critical_breakdown_count > 0)
 			&& !(this->type == VEH_SHIP && Ship::From(this)->critical_breakdown_count > 0)) {
 		return false;