[issue29259] Add tp_fastcall to PyTypeObject: support FASTCALL calling convention for all callable objects

[Roundup Robot]

Roundup Robot added the comment:

New changeset a3865d0c1844 by Victor Stinner in branch 'default':
Fix Python 2.6 support in python-gdb.py
https://hg.python.org/cpython/rev/a3865d0c1844

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<http://bugs.python.org/issue29259>
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