(svn r5594) Be more strict what's allowed to be built in a hangar: if the airport can't handle planes/helicopters don't present and disallow building planes/helicopters - the latter case wasn't covered yet.
Also remove an error message about building aircraft which can't be triggered by a normal client

/* $Id$ */

#ifndef GFXINIT_H
#define GFXINIT_H

void CheckExternalFiles(void);
void GfxLoadSprites(void);

#endif /* GFXINIT_H */