Git commits in Moodle 2.6.3 by Jean-Michel Vedrine

commit 081468fdb1d43beb0011cca09e460cdb3c47de02
Author: Jean-Michel Vedrine <vedrine@vedrine.org>
Date:   Wed, 07 Aug 2013 16:02:36 +0800
Tag:    v2.6.3

MDL-41063 Lesson qformat_default class is missing an error function