| Fixed the declaration of some public API functions. PyArg_VaParse() and | |
| PyArg_VaParseTupleAndKeywords() were not available in limited API. | |
| PyArg_ValidateKeywordArguments(), PyArg_UnpackTuple() and Py_BuildValue() | |
| were not available in limited API of version < 3.3 when PY_SSIZE_T_CLEAN is | |
| defined. |