selinux: Fix missing calls to netlbl_skbuff_err()

At some point I think I messed up and dropped the calls to netlbl_skbuff_err()
which are necessary for CIPSO to send error notifications to remote systems.
This patch re-introduces the error handling calls into the SELinux code.

Signed-off-by: Paul Moore <paul.moore@hp.com>
Acked-by: James Morris <jmorris@namei.org>
diff --git a/net/netlabel/netlabel_kapi.c b/net/netlabel/netlabel_kapi.c
index 6c211fe9..22faba6 100644
--- a/net/netlabel/netlabel_kapi.c
+++ b/net/netlabel/netlabel_kapi.c
@@ -490,6 +490,7 @@
  * netlbl_skbuff_err - Handle a LSM error on a sk_buff
  * @skb: the packet
  * @error: the error code
+ * @gateway: true if host is acting as a gateway, false otherwise
  *
  * Description:
  * Deal with a LSM problem when handling the packet in @skb, typically this is
@@ -497,10 +498,10 @@
  * according to the packet's labeling protocol.
  *
  */
-void netlbl_skbuff_err(struct sk_buff *skb, int error)
+void netlbl_skbuff_err(struct sk_buff *skb, int error, int gateway)
 {
 	if (CIPSO_V4_OPTEXIST(skb))
-		cipso_v4_error(skb, error, 0);
+		cipso_v4_error(skb, error, gateway);
 }
 
 /**