rt2x00: Fix memleak when RTS/CTS fails

When sending the RTS/CTS frame fails, we should
free the skb buffer which was created.
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/rt2x00/rt2x00mac.c

@@ -83,6 +83,7 @@ static int rt2x00mac_tx_rts_cts(struct rt2x00_dev *rt2x00dev,
 				  (struct ieee80211_rts *)(skb->data));
 
 	if (rt2x00queue_write_tx_frame(queue, skb)) {
+		dev_kfree_skb_any(skb);
 		WARNING(rt2x00dev, "Failed to send RTS/CTS frame.\n");
 		return NETDEV_TX_BUSY;
 	}