(svn r16311) -Fix: (Get|Set)TrackBits() is only valid for RAIL_TILE_NORMAL and _SIGNALS.

1 files changed, 2 insertions, 0 deletions

diff --git a/src/rail_map.h b/src/rail_map.h
index 7c8c31f85..195aef9f5 100644
--- a/src/rail_map.h
+++ b/src/rail_map.h
@@ -141,6 +141,7 @@ static inline void SetRailType(TileIndex t, RailType r)
  */
 static inline TrackBits GetTrackBits(TileIndex tile)
 {
+	assert(IsPlainRailTile(tile));
 	return (TrackBits)GB(_m[tile].m5, 0, 6);
 }
 
@@ -151,6 +152,7 @@ static inline TrackBits GetTrackBits(TileIndex tile)
  */
 static inline void SetTrackBits(TileIndex t, TrackBits b)
 {
+	assert(IsPlainRailTile(t));
 	SB(_m[t].m5, 0, 6, b);
 }