[IPV6]: Avoid garbage sin6_scope_id for MSG_ERRQUEUE messages.

net/ipv6/datagram.c

@@ -161,6 +161,7 @@ int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len)
 	if (serr->ee.ee_origin != SO_EE_ORIGIN_LOCAL) {
 		sin->sin6_family = AF_INET6;
 		sin->sin6_flowinfo = 0;
+		sin->sin6_scope_id = 0;
 		if (serr->ee.ee_origin == SO_EE_ORIGIN_ICMP6) {
 			memcpy(&sin->sin6_addr, &skb->nh.ipv6h->saddr, 16);
 			if (np->rxopt.all)