Possible data race on Windows (src/bin/pg_dump/parallel.c)

Hi,

Per Coverity.

CID 1542943: (#1 of 1): Data race condition (MISSING_LOCK)
3. missing_lock: Accessing slot->AH without holding lock signal_info_lock.
Elsewhere, ParallelSlot.AH is written to with signal_info_lock held 1 out
of 1 times (1 of these accesses strongly imply that it is necessary).

The function DisconnectDatabase effectively writes the ParallelSlot.AH.
So the call in the function archive_close_connection:

if (slot->AH)
DisconnectDatabase(&(slot->AH->public));

It should also be protected on Windows, correct?

Patch attached.

best regards,
Ranier Vilela