Git commits in Moodle 1.9.12 by Andrew Davis (andyjdavis)

commit 6c41ae0a0c6c9be40abfda810deb48ccbd524b9d
Author: Andrew Davis (andyjdavis) <andrew@moodle.com>
Date:   Wed, 30 Mar 2011 13:31:47 +0800
Tag:    v1.9.12

gradebook MDL-20946 switched from using IN to using JOIN in the quiries