clean up and optimize nth_packed_object_sha1() usage

diff --git a/reachable.c b/reachable.c
index 01760d70462927ad33c7976a50e31372863a45f9..ff3dd34962ec69320a67a4823b844755ebfe0e7d 100644 (file)
--- a/reachable.c
+++ b/reachable.c
@@ -42,8 +42,7 @@ static void process_tree(struct tree *tree,
        me.elem = name;
        me.elem_len = strlen(name);
 
-       desc.buf = tree->buffer;
-       desc.size = tree->size;
+       init_tree_desc(&desc, tree->buffer, tree->size);
 
        while (tree_entry(&desc, &entry)) {
                if (S_ISDIR(entry.mode))