[F] Two bugs in function update_first_post()

[WDZ]

File /inc/functions.php, function update_first_post

• The value of $post['replyto'] is checked even though the replyto field isn't loaded by the query.
• The replyto update query needs to be on the posts table, not the threads table.

[Ryan Gordon]

Thank you for your bug report.

This bug has been fixed in our internal code repository. Please note that the problem will not be fixed here until these forums are updated.