netfilter: nf_ct_tcp, udp: fix compilation with sysctl disabled

This patch fixes the compilation of the TCP and UDP trackers with sysctl
compilation disabled:

net/netfilter/nf_conntrack_proto_udp.c: In function ‘udp_init_net_data’:
net/netfilter/nf_conntrack_proto_udp.c:279:13: error: ‘struct nf_proto_net’ has no member named
 ‘user’
net/netfilter/nf_conntrack_proto_tcp.c:1606:9: error: ‘struct nf_proto_net’ has no member named
 ‘user’
net/netfilter/nf_conntrack_proto_tcp.c:1643:9: error: ‘struct nf_proto_net’ has no member named
 ‘user’

Reported-by: Fengguang Wu <wfg@linux.intel.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/netfilter/nf_conntrack_proto_tcp.c

@@ -1603,7 +1603,7 @@ static int tcpv4_init_net(struct net *net)
 #ifdef CONFIG_SYSCTL
 	if (!pn->ctl_table) {
 #else
-	if (!pn->user++) {
+	if (!pn->users++) {
 #endif
 		for (i = 0; i < TCP_CONNTRACK_TIMEOUT_MAX; i++)
 			tn->timeouts[i] = tcp_timeouts[i];
@@ -1640,7 +1640,7 @@ static int tcpv6_init_net(struct net *net)
 #ifdef CONFIG_SYSCTL
 	if (!pn->ctl_table) {
 #else
-	if (!pn->user++) {
+	if (!pn->users++) {
 #endif
 		for (i = 0; i < TCP_CONNTRACK_TIMEOUT_MAX; i++)
 			tn->timeouts[i] = tcp_timeouts[i];

net/netfilter/nf_conntrack_proto_udp.c

@@ -276,7 +276,7 @@ static void udp_init_net_data(struct nf_udp_net *un)
 #ifdef CONFIG_SYSCTL
 	if (!un->pn.ctl_table) {
 #else
-	if (!un->pn.user++) {
+	if (!un->pn.users++) {
 #endif
 		for (i = 0; i < UDP_CT_MAX; i++)
 			un->timeouts[i] = udp_timeouts[i];