[TCP]: Move LOSTRETRANS MIB outside !(L|S) check

Usually those skbs will have L set, not counting them as lost
retransmissions is misleading.
Signed-off-by: NIlpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/ipv4/tcp_input.c

@@ -1160,8 +1160,8 @@ static int tcp_mark_lost_retrans(struct sock *sk)
 				tp->lost_out += tcp_skb_pcount(skb);
 				TCP_SKB_CB(skb)->sacked |= TCPCB_LOST;
 				flag |= FLAG_DATA_SACKED;
-				NET_INC_STATS_BH(LINUX_MIB_TCPLOSTRETRANSMIT);
 			}
+			NET_INC_STATS_BH(LINUX_MIB_TCPLOSTRETRANSMIT);
 		} else {
 			if (before(ack_seq, new_low_seq))
 				new_low_seq = ack_seq;