(svn r13626) -Fix (r11871): signals were not updated when player removed signals from nonexistent track sharing bits with existing track
So disallow removing signals from nonexistent track
/* $Id$ */
/** @file newgrf_town.h Functions to handle the town part of NewGRF towns. */
#ifndef NEWGRF_TOWN_H
#define NEWGRF_TOWN_H
/* Currently there is no direct town resolver; we only need to get town
* variable results from inside stations, house tiles and industry tiles. */
uint32 TownGetVariable(byte variable, byte parameter, bool *available, const Town *t);
#endif /* NEWGRF_TOWN_H */