[NETFILTER] Remove nf_conntrack stat proc file when cleaning up

Fix nf_conntrack statistics proc file removal. Looks like the old bug
was forward-ported from ip_conntrack. :-]
Signed-off-by: KOVACS Krisztian <hidden@balabit.hu>
Signed-off-by: Harald Welte <laforge@netfilter.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/netfilter/nf_conntrack_standalone.c

@@ -694,7 +694,7 @@ static int init_or_cleanup(int init)
  cleanup_proc_stat:
 #endif
 #ifdef CONFIG_PROC_FS
-	proc_net_remove("nf_conntrack_stat");
+	remove_proc_entry("nf_conntrack", proc_net_stat);
  cleanup_proc_exp:
 	proc_net_remove("nf_conntrack_expect");
  cleanup_proc: