(svn r5624) Use {IsPlainRailTile,IsRailDepot,IsRailWaypoint,HasSignals}() instead of GetRailTile{T,Subt}ype() - this is more concise and a bit more flexible if/when the rail tile encoding changes

/* $Id */

#ifndef UNMOVABLE_H
#define UNMOVABLE_H

void UpdateCompanyHQ(Player *p, uint score);

#endif