(svn r3760) Replace some magic numbers for checking for a suitable slope for a level crossing by some less magic numbers. Quite similar to r3699, though this time for placing the rails
/* $Id$ */
#ifndef THREAD_H
#define THREAD_H
typedef struct Thread Thread;
typedef void* (*ThreadFunc)(void*);
Thread* OTTDCreateThread(ThreadFunc, void*);
void* OTTDJoinThread(Thread*);
#endif /* THREAD_H */