[BUG] sfpow issues with files bigger than 8G

[iulianmusat]

🐛 Bug report

I found the bug reported by Morgan Brown on Linkedin. Here is the link:

https://www.linkedin.com/feed/update/urn:li:activity:7204310601337106433?updateEntityUrn=urn%3Ali%3Afs_feedUpdate%3A%28V2%2Curn%3Ali%3Aactivity%3A7204310601337106433%29

Attached is a patch that seem to fix the issue.
tpow_64bit_indexes.txt