diff -r cded5f3a83c9 -r 0ee22ed51ada yapf/yapf.h
--- a/yapf/yapf.h	Tue Oct 17 14:52:55 2006 +0000
+++ b/yapf/yapf.h	Tue Oct 17 16:16:19 2006 +0000
@@ -27,10 +27,11 @@
  * @param v        the train that needs to find a path
  * @param tile     the tile to find the path from (should be next tile the train is about to enter)
  * @param enterdir diagonal direction which the RV will enter this new tile from
- * @param tracks   available tracks on the new tile (to choose from)
+ * @param trackdirs available trackdirs on the new tile (to choose from)
+ * @param no_path_found [out] true is returned if no path can be found (returned Trackdir is only a 'guess')
  * @return         the best trackdir for next turn or INVALID_TRACKDIR if the path could not be found
  */
-Trackdir YapfChooseRailTrack(Vehicle *v, TileIndex tile, DiagDirection enterdir, TrackdirBits trackdirs);
+Trackdir YapfChooseRailTrack(Vehicle *v, TileIndex tile, DiagDirection enterdir, TrackdirBits trackdirs, bool *path_not_found);
 
 /** Used by RV multistop feature to find the nearest road stop that has a free slot.
  * @param v      RV (its current tile will be the origin)