Hi Andrey,
Many thanks for your feedback!
> 1. The assignment ssup->ssup_extra = NULL can be removed. The
> SortSupport struct is zeroed before the callback is called (see
> sortsupport.h). There are about 22 similar assignments elsewhere;
> it does not seem to be established practice, many other places have
> no such assignment.
Agree. I removed this assignment in 0001 and added 0002 that removes
if for the rest of *_sortsupport() functions.
--
Best regards,
Aleksander Alekseev