Git commits in Moodle 2.7.4 by Tim Lock

commit 09a92706401b778b533c09bcd4dc2a959f88d0a0
Author: Tim Lock <tim.lock@netspot.com.au>
Date:   Thu, 16 Oct 2014 06:04:53 +0800
Tag:    v2.7.4

MDL-47700 Grades: Sitewide overview report isn't visible in some cases