netfilter: ctnetlink: fix filtering with CTA_TUPLE_REPLY

filter->orig_flags was used for a reply context.

Fixes: cb8aa9a ("netfilter: ctnetlink: add kernel side filtering for dump")
Signed-off-by: Florent Fourcot <florent.fourcot@wifirst.fr>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

net/netfilter/nf_conntrack_netlink.c

@@ -1011,7 +1011,7 @@ ctnetlink_alloc_filter(const struct nlattr * const cda[], u8 family)
 						   CTA_TUPLE_REPLY,
 						   filter->family,
 						   &filter->zone,
-						   filter->orig_flags);
+						   filter->reply_flags);
 		if (err < 0) {
 			err = -EINVAL;
 			goto err_filter;