[issue37493] Use _PyObject_CallNoArg() in a few more places

[Jeroen Demeyer]

New submission from Jeroen Demeyer <J.Demeyer at UGent.be>:

Try to use _PyObject_CallNoArg in all places where a function is called without arguments.

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components: Interpreter Core
messages: 347230
nosy: jdemeyer
priority: normal
severity: normal
status: open
title: Use _PyObject_CallNoArg() in a few more places
versions: Python 3.9

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue37493>
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