Fix notices warnings

include/database/PearDatabase.php

@@ -17,8 +17,8 @@ require_once 'include/logging.php';
include_once 'libraries/adodb/adodb.inc.php';
require_once 'libraries/adodb/adodb-xmlschema.inc.php';
-$log =& LoggerManager::getLogger('VT');
-$logsqltm =& LoggerManager::getLogger('SQLTIME');
+$log = LoggerManager::getLogger('VT');
+$logsqltm = LoggerManager::getLogger('SQLTIME');
// Callback class useful to convert PreparedStatement Question Marks to SQL value
// See function convertPS2Sql in PearDatabase below