(svn r1248) -Add: initial OS/2 support (read docs/ReadMe_OS2.txt) (orudge)

Works fine, beside some minor stuff:
  - Network is not working yet
  - Keyboard is not working
  - No MIDI support
  - 'A few file selector bugs involving drives'

order_gui.c

@@ -164,7 +164,10 @@ static void *FindVehicleCallb(Vehicle *v, FindVehS *f)
 
 Vehicle *GetVehicleOnTile(TileIndex tile, byte owner)
 {
-	FindVehS fs = {tile, owner, 0};
+	FindVehS fs;
+	fs.tile = tile;
+	fs.owner = owner;
+	fs.type = 0;
 	return VehicleFromPos(tile, &fs, (VehicleFromPosProc*)FindVehicleCallb);
 }