[Checkins] [zopefoundation/zodbpickle] ac5ecb: Fix comparison between signed and unsigned warning

[GitHub]

  Branch: refs/heads/py36-support
  Home:   https://github.com/zopefoundation/zodbpickle
  Commit: ac5ecbd85c44e105d117db8565620665bd2f2abe
      https://github.com/zopefoundation/zodbpickle/commit/ac5ecbd85c44e105d117db8565620665bd2f2abe
  Author: Marius Gedminas <marius at gedmin.as>
  Date:   2017-09-21 (Thu, 21 Sep 2017)

  Changed paths:
    M src/zodbpickle/_pickle_33.c

  Log Message:
  -----------
  Fix comparison between signed and unsigned warning

A similar fix was applied to CPython in https://bugs.python.org/issue22218