[Checkins] [zopefoundation/z3c.ptcompat] 676adb: Do not pass None as a filename to chameleon

[GitHub]

  Branch: refs/heads/issue2
  Home:   https://github.com/zopefoundation/z3c.ptcompat
  Commit: 676adb59bbbb8d6e7aeb5267c9f4363b171463b4
      https://github.com/zopefoundation/z3c.ptcompat/commit/676adb59bbbb8d6e7aeb5267c9f4363b171463b4
  Author: Jason Madden <jamadden at gmail.com>
  Date:   2017-10-16 (Mon, 16 Oct 2017)

  Changed paths:
    M CHANGES.txt
    M src/z3c/ptcompat/engine.py

  Log Message:
  -----------
  Do not pass None as a filename to chameleon

It breaks if you do. This changed in version 3.0:
https://github.com/malthe/chameleon/commit/f642c1dfb8dae782b34769934c0ded45007d8e4c

Fixes #2.