[BLUETOOTH] sco: Possible double free.

this fixes coverity bug id #1068.
hci_send_sco() frees skb if (skb->len > hdev->sco_mtu).
Since it returns a negative error value only in this case, we
can directly return here.
Signed-off-by: Eric Sesterhenn <snakebyte@gmx.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/bluetooth/sco.c

@@ -255,7 +255,7 @@ static inline int sco_send_frame(struct sock *sk, struct msghdr *msg, int len)
 	}
 
 	if ((err = hci_send_sco(conn->hcon, skb)) < 0)
-		goto fail;
+		return err;
 
 	return count;