From fa864a5672f4dc23357c78c68874db0ffa4ae8cb Mon Sep 17 00:00:00 2001
From: Julio Montoya <gugli100@gmail.com>
Date: Wed, 24 Oct 2012 12:27:39 +0200
Subject: [PATCH] Fixing removeUnusedFiles

---
 main/dropbox/dropbox_functions.inc.php | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/main/dropbox/dropbox_functions.inc.php b/main/dropbox/dropbox_functions.inc.php
index 4d640f1db7..98508d052e 100644
--- a/main/dropbox/dropbox_functions.inc.php
+++ b/main/dropbox/dropbox_functions.inc.php
@@ -646,8 +646,10 @@ function removeUnusedFiles() {
     $sql = "SELECT DISTINCT f.id, f.filename
 			FROM " . dropbox_cnf('tbl_file') . " f
 			LEFT JOIN " . dropbox_cnf('tbl_person') . " p 
-            ON (f.id = p.file_id AND f.c_id = $course_id AND p.c_id = $course_id )
-			WHERE p.user_id IS NULL";
+            ON (f.id = p.file_id)
+			WHERE p.user_id IS NULL AND
+                  f.c_id = $course_id 
+            ";
     $result = Database::query($sql);
     while ($res = Database::fetch_array($result)) {