netfilter: xt_recent: fix false match

A rule with a zero hit_count will always match.
Signed-off-by: NTim Gardner <tim.gardner@canonical.com>
Cc: stable@kernel.org
Signed-off-by: NPatrick McHardy <kaber@trash.net>

net/netfilter/xt_recent.c

@@ -267,7 +267,7 @@ recent_mt(const struct sk_buff *skb, const struct xt_match_param *par)
 		for (i = 0; i < e->nstamps; i++) {
 			if (info->seconds && time_after(time, e->stamps[i]))
 				continue;
-			if (++hits >= info->hit_count) {
+			if (info->hit_count && ++hits >= info->hit_count) {
 				ret = !ret;
 				break;
 			}