LTSDEV: Adjust SQL in get_users() for Oracle compatibility

locallib.php

@@ -849,7 +849,7 @@ class attforblock {
                      WHERE ue.userid $usql
                            AND e.status = :estatus
                            AND e.courseid = :courseid
-                  GROUP BY ue.userid, ue.status, ue.timestart, ue.timeend;";
+                  GROUP BY ue.userid, ue.status, ue.timestart, ue.timeend";
             $params = array_merge($uparams, array('estatus'=>ENROL_INSTANCE_ENABLED, 'courseid'=>$this->course->id));
             $enrolmentsparams = $DB->get_records_sql($sql, $params);