9782988 Fix a signedness bug in OTP code

1 file Authored by npmccallum 9 years ago, Committed by pvoborni 9 years ago,
    Fix a signedness bug in OTP code
    
    This bug caused negative token windows to wrap-around, causing issues
    with TOTP authentication and (especially) synchronization.
    
    https://fedorahosted.org/freeipa/ticket/4990
    
    Reviewed-By: Martin Babinsky <mbabinsk@redhat.com>