xtables-restore: remove dependency with libip4tc

Add a new operation structure, we don't actually need the libip4tc
definition.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
diff --git a/iptables/xtables-restore.c b/iptables/xtables-restore.c
index 9a80f1e..230894c 100644
--- a/iptables/xtables-restore.c
+++ b/iptables/xtables-restore.c
@@ -161,6 +161,10 @@
 	}
 }
 
+static const struct xtc_ops xtc_ops = {
+	.strerror	= nft_strerror,
+};
+
 int
 xtables_restore_main(int argc, char *argv[])
 {
@@ -173,7 +177,7 @@
 	FILE *in;
 	int in_table = 0, testing = 0;
 	const char *tablename = NULL;
-	const struct xtc_ops *ops = &iptc_ops;
+	const struct xtc_ops *ops = &xtc_ops;
 	struct nft_chain_list *chain_list;
 	struct nft_chain *chain_obj;