[issue37483] Add PyObject_CallOneArg()

[Jeroen Demeyer]

Jeroen Demeyer <J.Demeyer at UGent.be> added the comment:

> _PyObject_CALL_WITH_ARGS(func, PyDict_GetItem(d, key)); // PyDict_GetItem(d, key) is called twice.

That's pretty bad and in my opinion a good reason to reject this idea.

> If two or more arguments are not common, I prefer _PyObject_CallOneArg to macro.

I posted some counts at https://mail.python.org/archives/list/capi-sig@python.org/message/3I76R27YMFSKB5JQIM3E4NA3BECVTZHP/

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