Please commit fix for x11/xcb-proto PR 265022

[Miroslav Lachman]

There is a bug in x11/xcb-proto, failing the build for Python 3.7. 
Python 3.7 is still supported version. Can this fix be committed to main 
and 2022Q3 please?

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=265022
Kind regards
Miroslav Lachman