proc: show per-net ip_devconf.forwarding in /proc/net/snmp

This one has become per-net long ago, but the appropriate file
is per-net only now.
Signed-off-by: NPavel Emelyanov <xemul@openvz.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/ipv4/proc.c

@@ -342,7 +342,7 @@ static int snmp_seq_show(struct seq_file *seq, void *v)
 		seq_printf(seq, " %s", snmp4_ipstats_list[i].name);
 
 	seq_printf(seq, "\nIp: %d %d",
-		   IPV4_DEVCONF_ALL(&init_net, FORWARDING) ? 1 : 2,
+		   IPV4_DEVCONF_ALL(net, FORWARDING) ? 1 : 2,
 		   sysctl_ip_default_ttl);
 
 	for (i = 0; snmp4_ipstats_list[i].name != NULL; i++)