Update MessageIndex.php
Update MessageIndex.php

- query string was overlooked resulting in "Couldn't fetch mysqli_result" errors

Signed-off-by: Underdog-01 <1db25f2882fc57361efdb0f5a641ce8639efaed5@gmail.com>
StealthWombat/SMF2.1-more-forkery,StealthWombat/SMF2.1-more-forkery