Bug#942666: fix ftbfs with python3.8

[Matthias Klose]

Package: src:pycairo
Version: 1.16.2-1
Severity: important
Tags: sid bullseye patch
User: debian-pyt...@lists.debian.org
Usertags: python3.8

Patch at
http://launchpadlibrarian.net/447566367/pycairo_1.16.2-1build3_1.16.2-1ubuntu1.diff.gz