Git commits in Moodle 2.3.4 by Jean-Philippe Gaudreau

commit d71792da4f678aa222a733a60a8d4df34b51196e
Author: Jean-Philippe Gaudreau <jp.gaudreau@umontreal.ca>
Date:   Fri, 04 Jan 2013 22:53:03 +0800
Tag:    v2.3.4

MDL-37161 Backup: Database error caused by grade book settings when importing or restoring a course