From 95fb95cb3eb7ed0eec93bcc22d072f64dfb2f9e8 Mon Sep 17 00:00:00 2001
From: ericmerrill <ericmerrill>
Date: Wed, 9 Jan 2008 02:08:04 +0000
Subject: [PATCH] MDL-11674

Undid change that could result in dataloss.
---
 mod/chat/lib.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mod/chat/lib.php b/mod/chat/lib.php
index 6b00d5abe67..072ba9cebd5 100644
--- a/mod/chat/lib.php
+++ b/mod/chat/lib.php
@@ -212,7 +212,7 @@ function chat_cron () {
 
     $sql = "DELETE
               FROM {$CFG->prefix}chat_messages
-             WHERE ($subselect) IS NOT NULL AND timestamp < ( ".time()." -($subselect) * 24 * 3600)"; 
+             WHERE ($subselect) > 0 AND timestamp < ( ".time()." -($subselect) * 24 * 3600)"; 
 
     execute_sql($sql, false);