[issue29507] Use FASTCALL in call_method() to avoid temporary tuple

[INADA Naoki]

INADA Naoki added the comment:

> But PyObject_CallMethod(), _PyObject_CallMethodId(), PyObject_CallMethodObjArgs(), _PyObject_CallMethodIdObjArgs() can use it too.

CallMethod[Id]ObjArgs() can use it easily.
But format support is not so easy.

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Added file: http://bugs.python.org/file46603/callmethod.patch

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