(svn r2119) - Fix: [ 1172878 ] Trains "Go to depot" button: click twice skip to next order (patch by Loic GUILLOUX). I also added short explanation of OF_/OFB_ difference to order.h.

#ifndef CALLBACK_TABLE_H
#define CALLBACK_TABLE_H

extern CommandCallback *_callback_table[];
extern const int _callback_table_count;

#endif