list-objects-filter: plug pattern_list leak

filter_sparse_oid__init() uses add_patterns_from_blob_to_list() to
populate the struct pattern_list member of struct filter_sparse_data.
Release it in the complementing filter_sparse_free().

Signed-off-by: René Scharfe <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: rscharfe

list-objects-filter.c

@@ -514,6 +514,7 @@ static enum list_objects_filter_result filter_sparse(
 static void filter_sparse_free(void *filter_data)
 {
 	struct filter_sparse_data *d = filter_data;
+	clear_pattern_list(&d->pl);
 	free(d->array_frame);
 	free(d);
 }