SpiderOak/ZipStream — pull request #5 by johnhe00 (2014-01-19 18:59:20+00:00)
Title: Ensure CRC is a positive value

The zip process fails when CRC is a negative value. Making the value positive fixes the problem.
Related bug:
- https://github.com/devsnd/cherrymusic/issues/405
- https://github.com/SpiderOak/ZipStream/issues/4