Cdrtools with SPTI (Win32)

Running Cdrtools under Microsoft Windows requires a working ASPI-Driver. Windows NT/2000/XP comes without installed ASPI, so it must be installed individually (recommended: Adaptec ASPI). But under this OS, there is another access-method, SPTI (SCSI Pass-Through Interface). In meantime this is used by many burning applications and preferred by Microsoft. I have extracted the required code from AKRip CD-DA Audio Extraction Library for SPTI Support and integrated it into libscg (scsi-wnt.c). AKRip here essentially emulates the ASPI functionality.