Fix invalid reference operator of array for usort

diff --git a/plugin/tracker.inc.php b/plugin/tracker.inc.php
index cc7877a..06af55b 100644 (file)
--- a/plugin/tracker.inc.php
+++ b/plugin/tracker.inc.php
@@ -797,7 +797,7 @@ class Tracker_list
                        $sort_keys[] = array('field' => $field, 'dir' => $order);
                }
                $this->sort_keys = $sort_keys;
-               usort(&$this->rows, array($this, 'compare'));
+               usort($this->rows, array($this, 'compare'));
        }
        function replace_item($arr)
        {