gpt_check_ais
if ((sectors = gpt_check_ais(gpt, alignment, ~0U, size)) == -1)
off_t gpt_check_ais(gpt_t, off_t, u_int, off_t);
if ((sectors = gpt_check_ais(gpt, alignment, entry, size)) == -1)
if ((sector = gpt_check_ais(gpt, 0, (u_int)~0, size)) == -1)