Git commits in Moodle 2.2.7 by Huy Hoang

commit a8f5d3814d7e413881c2a9a1089ed150c78c08af
Author: Huy Hoang <hoang027@umn.edu>
Date:   Thu, 01 Nov 2012 17:14:45 +0800
Tag:    v2.2.7

MDL-34695 Wiki Module: add prevention to create new record when userid is 0