e36c01aff7
If the base image (parent) of an image contains e.g. whitespace in it's path, the current untainting would not match and it would seem there was no parent. Since untrusted files are not allowed to have backing parts, just warn, when encountering this case to keep backwards compatibility. Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>