refs.c: spell NULL pointer as NULL

diff --git a/tree.c b/tree.c
index 549e5883a01bb31010861aad991993772d238309..c8c49d7b78174199da94d802e1ca7037866b5f04 100644 (file)
--- a/tree.c
+++ b/tree.c
@@ -225,6 +225,14 @@ int parse_tree(struct tree *item)
        return parse_tree_buffer(item, buffer, size);
 }
 
+void free_tree_buffer(struct tree *tree)
+{
+       free(tree->buffer);
+       tree->buffer = NULL;
+       tree->size = 0;
+       tree->object.parsed = 0;
+}
+
 struct tree *parse_tree_indirect(const unsigned char *sha1)
 {
        struct object *obj = parse_object(sha1);