(svn r10266) -Codechange: keep track of the origin, time of travel and accumulated feeder share (transfers) of individual pieces of cargo. This means that cargo isn't thrown on a big pile when it's put in a station or unloaded at a station, however the GUI does not reflect these changes yet so you will not actually see it.

src/openttd.h

@@ -59,6 +59,7 @@ typedef EngineID *EngineList; ///< engine list type placeholder acceptable for C
 /* IDs used in Pools */
 typedef uint16 VehicleID;
 typedef uint16 StationID;
+static const StationID INVALID_STATION = 0xFFFF;
 typedef uint16 RoadStopID;
 typedef uint16 TownID;
 typedef uint16 IndustryID;