Git commits in Moodle 2.9.4 by Pavel Sokolov

commit e45ba0143bb88a7c7584fb670e5a49f70a12bce5
Author: Pavel Sokolov <pavel.m.sokolov@gmail.com>
Date:   Thu, 05 Dec 2013 21:00:34 +0800
Tag:    v2.9.4

MDL-43069 assign: prevent JS error on grading table