Git commits in Moodle 2.2.2 by Eduardo Pinto

commit c468eab4f04767009a608ed081dd4d4ea8a4bb02
Author: Eduardo Pinto <efgpinto@gmail.com>
Date:   Thu, 23 Feb 2012 14:05:07 +0800
Tag:    v2.2.2

MDL-26496 Lesson Module: removed warning when no answer is selected from single choice question