This is a cosmetic fix only, this bug is present since at least 0.72,
but only became apparent since commit 4cebc5af, which made the error
no longer silently ignored (v0.72.3).
Fixes one of the reported problem of issue #19.
The feature was disabled by the author in this version, as it missed RS03
awareness. We enable it if we find RS01, RS02 or no ECC data, and warn the
user if we find RS03, telling him that the wise choice is to cancel and
rely on linear read
This option can be useful to try to work with normally unsupported media types.
Namely the Windows 10 default iso mounter (and virtual drive) is tagged DVD-DROM,
even if it mounts bare iso images. Useful for debugging (requires --debug).
