+- The distutils version has been changed to 2.5.0. The change to
+ keep it programmatically in sync with the Python version running
+ the code (introduced in 2.5b3) has been reverted. It will continue
+ to be maintained manually as static string literal.
- If a the Python part of a ctypes callback function returns None,
and this cannot be converted to the required C type, an exception is
printed with PyErr_WriteUnraisable. Before this change, the C