al_set_menu_item_icon - Allegro 5 API

       Sets  the  icon  for  the  specified menu item.  The menu assumes ownership of the ALLEGRO_BITMAP and may
       invalidate the pointer, so you must clone it if you wish to continue using it.

       If a video bitmap is passed, it will automatically be converted to a memory bitmap, so it  is  preferable
       to pass a memory bitmap.

       al_set_menu_item_icon - Allegro 5 API

al_get_menu_item_icon(3alleg5), al_clone_bitmap(3alleg5)

Allegro reference manual                                                          al_set_menu_item_icon(3alleg5)

       5.1.0

              #include <allegro5/allegro_native_dialog.h>

              void al_set_menu_item_icon(ALLEGRO_MENU *menu, int pos, ALLEGRO_BITMAP *icon)