Git commits in Moodle 2.4.11 by Ankit Agarwal

commit c110815236e57d468a2c974ad06f12e7186ce5d7
Author: Ankit Agarwal <ankit@moodle.com>
Date:   Thu, 10 Jul 2014 17:44:59 +0800
Tag:    v2.4.11

MDL-46148 qtype_calculated: low-level defence against bad formulas