fixup

src/knot/zone/contents.c

@@ -331,6 +331,7 @@ int zone_contents_find_dname(const zone_contents_t *zone,
 		return ZONE_NAME_FOUND;
 	} else {
 		assert(prev);
+		*match = NULL;
 		node = prev;
 		size_t matched_labels = knot_dname_matched_labels(node->owner, name);
 		while (matched_labels < knot_dname_labels(node->owner, NULL)) {