ipv6: setsockopt(IPIPPROTO_IPV6, IPV6_MINHOPCOUNT) forgot to set return value

Cc: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: NHannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/ipv6/ipv6_sockglue.c

@@ -827,6 +827,7 @@ static int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
 		if (val < 0 || val > 255)
 			goto e_inval;
 		np->min_hopcount = val;
+		retv = 0;
 		break;
 	case IPV6_DONTFRAG:
 		np->dontfrag = valbool;