cba167b874
instead of filling them with zeroes this fixes an issue where we could not restore a container with large sparse files in the backup (e.g. a 10GiB sparse file in a container with a 8GiB disk) if the last operation of the copy was a seek, we need to truncate the file to the correct size (seek beyond filesize does not change it) Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>