u32
ft_putvd_fd(void *v, u32 fd) {
	u32	count;
	u64	u;

	if (v == NULL)
		return (ft_putstr_fd("(nil)", fd));
	u = (u64)v;
	count = 2;
	ft_putstr_fd("0x", fd);
	count += ft_putnbrhex_fd(u, fd);
	return (count);
}