The patch provides a correction to an IO operation in the `main` of
`MFTINDX.py`. Two comparisons of a `bytes` slice are compared to
strings which will always return false. The correction reduces
`mypy --strict` type review errors.

The patch restores the functionality of the `if` branch.

The patch is written to pass mypy static type review when tested with
the following:
```bash
mypy list_mft.py MFTINDX.py
```

Disclaimer: Participation by NIST in the creation of the documentation
of mentioned software is not intended to imply a recommendation or
endorsement by the National Institute of Standards and Technology, nor
is it intended to imply that any specific software is necessarily the
best available for the purpose.

Licensing:
Portions of this patch contributed by NIST are governed by the NIST
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Reviewed-by: Alex Nelson <[email protected]>
Signed-off-by: Sheldon Douglas <[email protected]>