(svn r24481) -Feature [FS#5127]: Make the pathfinder decide whether ships shall leave depots towards north or south.

src/pathfinder/npf/npf_func.h

@@ -49,6 +49,13 @@ Trackdir NPFRoadVehicleChooseTrack(const RoadVehicle *v, TileIndex tile, DiagDir
  */
 Track NPFShipChooseTrack(const Ship *v, TileIndex tile, DiagDirection enterdir, TrackBits tracks, bool &path_found);
 
+/**
+ * Returns true if it is better to reverse the ship before leaving depot using NPF.
+ * @param v the ship leaving the depot
+ * @return true if reversing is better
+ */
+bool NPFShipCheckReverse(const Ship *v);
+
 /**
  * Used when user sends train to the nearest depot or if train needs servicing using NPF
  * @param v            train that needs to go to some depot