…n returning from void functions

…n returning from void functions

…ings when returning from void functions"

This reverts commit 24b2d14.

This reverts commit dd524f2.

The worker might have not started yet or it may never start,
because its registration was cancelled due to worker limit.

This commit adds a check for NULL value of pgws_collector_hdr->latch.
The previous usage in pg_wait_sampling.c has such a check, we
should do the same here.

Check that collector has started in pg_wait_sampling_reset_profile.

Commit postgres/postgres@c83ac02 added new last argument ExplainState *es to
standard_planner function and planner_hook_type type.

postgres 19 support