net: correct off-by-one write allocations reports

commit 2b85a34e911bf483c27cfdd124aeb1605145dc80
(net: No more expensive sock_hold()/sock_put() on each tx)
changed initial sk_wmem_alloc value.

We need to take into account this offset when reporting
sk_wmem_alloc to user, in PROC_FS files or various
ioctls (SIOCOUTQ/TIOCOUTQ)

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c
index 8b6bbb3..2936fa3 100644
--- a/net/netlink/af_netlink.c
+++ b/net/netlink/af_netlink.c
@@ -1914,8 +1914,8 @@
 			   s->sk_protocol,
 			   nlk->pid,
 			   nlk->groups ? (u32)nlk->groups[0] : 0,
-			   atomic_read(&s->sk_rmem_alloc),
-			   atomic_read(&s->sk_wmem_alloc),
+			   sk_rmem_alloc_get(s),
+			   sk_wmem_alloc_get(s),
 			   nlk->cb,
 			   atomic_read(&s->sk_refcnt),
 			   atomic_read(&s->sk_drops)