info_ptr->created_paths_count can be 0, so don't blindly dereference
info_ptr->created_paths[ created_paths_count - 1].  Apparently we never
used to have 0 at the cleanup_name_on_this_level before, but now that
we can fail with -eperm and not just -eexist, we do.
Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>