ipv4: Fetch route saddr from flow key in ip4_datagram_connect().

Now that output route lookups update the flow with
source address selection, we can fetch it from
fl4->saddr instead of rt->rt_src
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/ipv4/datagram.c

@@ -63,9 +63,9 @@ int ip4_datagram_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
 		return -EACCES;
 	}
 	if (!inet->inet_saddr)
-		inet->inet_saddr = rt->rt_src;	/* Update source address */
+		inet->inet_saddr = fl4.saddr;	/* Update source address */
 	if (!inet->inet_rcv_saddr) {
-		inet->inet_rcv_saddr = rt->rt_src;
+		inet->inet_rcv_saddr = fl4.saddr;
 		if (sk->sk_prot->rehash)
 			sk->sk_prot->rehash(sk);
 	}