(prelude to issue #6531).

(prelude to issue #6531).

PyDateTime_DELTA_GET_DAYS, PyDateTime_DELTA_GET_SECONDS,
PyDateTime_DELTA_GET_MICROSECONDS.

Please use them instead of directly accessing PyDateTime_Delta struct members.

Patch by Oleg Plakhotnyuk.

Patch by Oleg Plakhotnyuk.

The PyCursesWindow_getsets array was introduced without sentinel in c3581ca21a57.

More descriptive names are now used in order to make tracebacks
more readable.

change).  configure will be regenerated in the next commit.

changes).