The size and throwaway fields in the history can bother be omitted, making the emptiness of a layer ambiguous. In these cases download and check whether the content is empty. Signed-off-by: Derek McGowan <derek@mcgstyle.net>
Handle reliance on the size field when the throwaway field is not used. Signed-off-by: Derek McGowan <derek@mcgstyle.net>
closes #851 Signed-off-by: Derek McGowan <derek@mcgstyle.net>