[SCTP]: Don't bother setting sin_port in ->from_sk().

... the only caller will overwrite immediately

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/sctp/ipv6.c

@@ -371,7 +371,7 @@ static void sctp_v6_from_skb(union sctp_addr *addr,struct sk_buff *skb,
 static void sctp_v6_from_sk(union sctp_addr *addr, struct sock *sk)
 {
 	addr->v6.sin6_family = AF_INET6;
-	addr->v6.sin6_port = inet_sk(sk)->num;
+	addr->v6.sin6_port = 0;
 	addr->v6.sin6_addr = inet6_sk(sk)->rcv_saddr;
 }
 

net/sctp/protocol.c

@@ -272,7 +272,7 @@ static void sctp_v4_from_skb(union sctp_addr *addr, struct sk_buff *skb,
 static void sctp_v4_from_sk(union sctp_addr *addr, struct sock *sk)
 {
 	addr->v4.sin_family = AF_INET;
-	addr->v4.sin_port = inet_sk(sk)->num;
+	addr->v4.sin_port = 0;
 	addr->v4.sin_addr.s_addr = inet_sk(sk)->rcv_saddr;
 }