net/ipv6/udp.c: fix typo in flush_stack()

skb1 should be passed as parameter to sk_rcvqueues_full() here.

Signed-off-by: Jiri Pirko <jpirko@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index 7aad127..26a8da3 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -602,7 +602,7 @@
 
 		sk = stack[i];
 		if (skb1) {
-			if (sk_rcvqueues_full(sk, skb)) {
+			if (sk_rcvqueues_full(sk, skb1)) {
 				kfree_skb(skb1);
 				goto drop;
 			}