[Checkins] [zopefoundation/Persistence] 4f5745: Update ExtensionClass header files.

[GitHub]

  Branch: refs/heads/py3-c-extension-2
  Home:   https://github.com/zopefoundation/Persistence
  Commit: 4f5745c7cff9be7aaca2126102d7d15029d70bd7
      https://github.com/zopefoundation/Persistence/commit/4f5745c7cff9be7aaca2126102d7d15029d70bd7
  Author: Hanno Schlichting <hanno at hannosch.eu>
  Date:   2017-02-02 (Thu, 02 Feb 2017)

  Changed paths:
    M .travis.yml
    M include/ExtensionClass/ExtensionClass.h
    M include/ExtensionClass/_compat.h

  Log Message:
  -----------
  Update ExtensionClass header files.