[Checkins] [zopefoundation/BTrees] ab0003: Python 3: Stop using undocumented PyLong_AS_LONG.

[Jason Madden]

  Branch: refs/heads/issue131
  Home:   https://github.com/zopefoundation/BTrees
  Commit: ab00035ae73042b523dc55abdcc9e408aa5bd5b4
      https://github.com/zopefoundation/BTrees/commit/ab00035ae73042b523dc55abdcc9e408aa5bd5b4
  Author: Jason Madden <jamadden at gmail.com>
  Date:   2020-03-21 (Sat, 21 Mar 2020)

  Changed paths:
    M BTrees/_compat.h

  Log Message:
  -----------
  Python 3: Stop using undocumented PyLong_AS_LONG.

Since https://github.com/zopefoundation/persistent/issues/125 this would result in compiler warnings.

No change note, this is an internal change.

Fixes #131