(svn r1834) - Fix: NPF does not check the owner of its target, busses try to enter other players' depots. TODO

- Add: asserts to find the v->u.rail.track == 0 problem.
- Add: IsValidDepot(), IsValidTown(), IsValidSign(), IsValidVehicle(), IsValidStation()
- Add: GetTileOwner(), IsTileOwner()
- Codechange: Replaced IsShipDepotTile(), IsTrainDepotTile(), IsRoadDepotTile() by IsTileDepotType().
- Codechange: typedeffed the MAP_OWNERS as Owner. Should be used as variable type.
- Codechange: Replaced a few uint by TileIndex.

1 files changed, 8 insertions, 0 deletions

diff --git a/town.h b/town.h
index c5c3b574f..cf7eee16e 100644
--- a/town.h
+++ b/town.h
@@ -134,6 +134,14 @@ VARDEF uint16 *_town_sort;
 extern MemoryPool _town_pool;
 
 /**
+ * Check if a Town really exists.
+ */
+static inline bool IsValidTown(Town* town)
+{
+	return town->xy != 0; /* XXX: Replace by INVALID_TILE someday */
+}
+
+/**
  * Get the pointer to the town with index 'index'
  */
 static inline Town *GetTown(uint index)