When backing up, errors.

[rrusso]

++ get_role_users() adding u.lastname, u.firstname, u.id to the query result because they were required by $sort but missing in $fields ++

• line 4226 of /lib/accesslib.php: call to debugging()
• line 56 of /blocks/backadel/lib.php: call to get_role_users()
• line 90 of /blocks/backadel/lib.php: call to generate_suffix()
• line 86 of /blocks/backadel/classes/task/backup_task.php: call to backadel_backup_course()
• line 51 of /blocks/backadel/classes/task/backup_task.php: call to block_backadel\task\begin_backup_task()
• line 75 of /lib/cronlib.php: call to block_backadel\task\backup_task->execute()
• line 61 of /admin/cli/cron.php: call to cron_run()
  ++ get_role_users() adding u.lastname, u.firstname, u.id to the query result because they were required by $sort but missing in $fields ++
• line 4226 of /lib/accesslib.php: call to debugging()
• line 56 of /blocks/backadel/lib.php: call to get_role_users()
• line 90 of /blocks/backadel/lib.php: call to generate_suffix()
• line 86 of /blocks/backadel/classes/task/backup_task.php: call to backadel_backup_course()
• line 51 of /blocks/backadel/classes/task/backup_task.php: call to block_backadel\task\begin_backup_task()
• line 75 of /lib/cronlib.php: call to block_backadel\task\backup_task->execute()
• line 61 of /admin/cli/cron.php: call to cron_run()