ipc/mqueue.c: delete an unnecessary check before the macro call dev_k…

…free_skb()

dev_kfree_skb() input parameter validation, thus the test around the call
is not needed.

This issue was detected by using the Coccinelle software.

Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Markus Elfring <[email protected]>
Cc: Davidlohr Bueso <[email protected]>
Cc: Manfred Spraul <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

ipc/mqueue.c

@@ -1333,7 +1333,7 @@ static int do_mq_notify(mqd_t mqdes, const struct sigevent *notification)
 out:
 	if (sock)
 		netlink_detachskb(sock, nc);
-	else if (nc)
+	else
 		dev_kfree_skb(nc);
 
 	return ret;