ipv4: Handle ipv6 gateway in fib_detect_death

			    struct fib_info **last_resort, int *last_idx,

			    int dflt)

{

	const struct fib_nh_common *nhc = fib_info_nhc(fi, 0);

	struct neighbour *n;

	int state = NUD_NONE;

	n = neigh_lookup(&arp_tbl, &fi->fib_nh[0].fib_nh_gw4, fi->fib_dev);

	if (likely(nhc->nhc_gw_family == AF_INET))

		n = neigh_lookup(&arp_tbl, &nhc->nhc_gw.ipv4, nhc->nhc_dev);

	else if (nhc->nhc_gw_family == AF_INET6)

		n = neigh_lookup(ipv6_stub->nd_tbl, &nhc->nhc_gw.ipv6,

				 nhc->nhc_dev);

	else

		n = NULL;

	if (n) {

		state = n->nud_state;

		neigh_release(n);