Git commits in Moodle 1.5.4 by paca70

commit ad25a2d8fe1b436fdf0d53cf69bfe5095d1aa960
Author: paca70 <paca70>
Date:   Tue, 29 Nov 2005 20:14:08 +0800
Tag:    v1.5.4

Prevent error messages if groupdn does not exists