new_node: Fixed a leak.

src/knot/modules/synth_record.c

@@ -228,7 +228,7 @@ static int forward_rr(char *addr_str, synth_template_t *tpl, knot_pkt_t *pkt, kn
 static knot_rrset_t *synth_rr(char *addr_str, synth_template_t *tpl, knot_pkt_t *pkt, struct query_data *qdata)
 {
 	/* Synthetize empty RR. */
-	knot_dname_t* qname = knot_dname_copy(qdata->name, NULL);
+	knot_dname_t* qname = knot_dname_copy(qdata->name, &pkt->mm);
 	knot_rrset_t *rr = knot_rrset_new(qname, 0, KNOT_CLASS_IN, &pkt->mm);
 	if (rr == NULL) {
 		knot_dname_free(&qname, NULL);