iso: Allow 512 byte sector size

Real CD-ROMs are pretty obsolete these days. Usually people still keep
iso files around, but just put them on USB sticks or SD cards and expect
them to "just work".

To support this use case with El Torito images, add support for 512 byte
sector size to the iso parsing code.

Signed-off-by: Alexander Graf <agraf@suse.de>
1 file changed