netfilter: xt_quota: fix incomplete initialization

Commit v2.6.29-rc5-872-gacc738fe ("xtables: avoid pointer to self")
forgot to copy the initial quota value supplied by iptables into the
private structure, thus counting from whatever was in the memory
kmalloc returned.
Signed-off-by: NJan Engelhardt <jengelh@medozas.de>
Signed-off-by: NPatrick McHardy <kaber@trash.net>

net/netfilter/xt_quota.c

@@ -54,6 +54,7 @@ static bool quota_mt_check(const struct xt_mtchk_param *par)
 	if (q->master == NULL)
 		return -ENOMEM;
 
+	q->master->quota = q->quota;
 	return true;
 }