M302de: replace 4 CLib functions with callbacks
M302de: add callback for farfree()
M302de: bypass free_voc_buffer()
M302de: bypass init_AIL() and exit_AIL()
M302de: bypass stop_midi_playback()
M302de: bypass do_* and load_midi_file()
M302de: bypass 3 midi functions
M302de: bypass do_play_music_file()
M302de: bypass play_music_file()
M302de: use a constant for CDA_DATASEG
M302de: bypass mouse_reset_ehandler()
M302de: bypass disable_mouse()
M302de: BC: add INTCAST macro
M302de: bypass reset_timer()
M302de: bypass bc_clrscr()
M302de: bypass bc_unlink()
M302de: bypass bc_findfirst() / bc_findnext()
M302de: bypass cleanup_game()
M302de: add two dummy CD functions
M302de: replace callback with original set_audio_track()