net: Add missing braces to multi-statement if()s

One finds all kinds of crazy things with some shell pipelining.

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi>
Acked-by: David Howells <dhowells@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/rxrpc/ar-transport.c b/net/rxrpc/ar-transport.c
index bb282a6..64069c8 100644
--- a/net/rxrpc/ar-transport.c
+++ b/net/rxrpc/ar-transport.c
@@ -184,12 +184,13 @@
 	ASSERTCMP(atomic_read(&trans->usage), >, 0);
 
 	trans->put_time = get_seconds();
-	if (unlikely(atomic_dec_and_test(&trans->usage)))
+	if (unlikely(atomic_dec_and_test(&trans->usage))) {
 		_debug("zombie");
 		/* let the reaper determine the timeout to avoid a race with
 		 * overextending the timeout if the reaper is running at the
 		 * same time */
 		rxrpc_queue_delayed_work(&rxrpc_transport_reap, 0);
+	}
 	_leave("");
 }