Re: [PATCH/WIP 04/11] tree-walk.c: do not leak internal structure in tree_entry_len()

> tree_entry_len() does not simply take two random arguments and return
> a tree length. The two pointers must point to a tree item structure,
> or struct name_entry. Passing random pointers will return incorrect
> value.
>
> Force callers to pass struct name_entry instead of two pointers (with
> hope that they don't manually construct struct name_entry themselves)