[NETFILTER]: nf_conntrack: fix sparse warning

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/netfilter/nf_conntrack_standalone.c b/net/netfilter/nf_conntrack_standalone.c
index ea34090..e88e96a 100644
--- a/net/netfilter/nf_conntrack_standalone.c
+++ b/net/netfilter/nf_conntrack_standalone.c
@@ -384,7 +384,7 @@
 	{ .ctl_name = 0 }
 };
 
-struct ctl_path nf_ct_path[] = {
+static struct ctl_path nf_ct_path[] = {
 	{ .procname = "net", .ctl_name = CTL_NET, },
 	{ }
 };