M302de: bypass (not really ) draw_loc_icons()
DOSBox-custom: handle function pointer call instruction

Besides the 5 Byte (0x9a) far call there exists also an instruction
which is only 3 Byte (0xff) and reads the adress from memory.
M302de: activate enter_map()
M302de: bypass show_storytext()
M302de: add callback for handle_gui_input()
M302de: add more constants
M302de: add speed macro

When too much functions are bypassed, some sequences are very quickly gone.
M302de: bypass show_citizen()

Shows the, not so amused, citizen of a house.
M302de: bypass init_ani_busy_loop()
M302de: add callback for set_audio_track()