sctp: fix bogus if statement in sctp_auth_recv_cid()

There is an extra semi-colon here, so we always return 0 instead of
calling __sctp_auth_cid().
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/sctp/auth.c

@@ -695,7 +695,7 @@ int sctp_auth_recv_cid(sctp_cid_t chunk, const struct sctp_association *asoc)
 		return 0;
 
 	net = sock_net(asoc->base.sk);
-	if (!net->sctp.auth_enable);
+	if (!net->sctp.auth_enable)
 		return 0;
 
 	return __sctp_auth_cid(chunk,