fdc: fix implied seek while there is no media in drive
The Windows uses 'READ' command at the start of an instalation without checking the 'dir' register. We have to abort the transfer with an abnormal termination if there is no media in the drive. Signed-off-by: NPavel Hrdina <phrdina@redhat.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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