[PATCH] fix build failure with Python 3.7

[Pedro Alves]

On 06/01/2018 02:22 PM, Paul.Koning@dell.com wrote:
> Ok, here is the patch in its current state.  Ok to commit?

Yes, but recall to include the rationale in the git commit log, and
to include the link to the original Python issue in there.

Thanks,
Pedro Alves