Git commits in Moodle 2.1.2 by Kyle Temkin

commit 18d81bdb3c45b8cbe0a33f81ace28c4a3d0f8e54
Author: Kyle Temkin <ktemkin@binghamton.edu>
Date:   Thu, 22 Sep 2011 19:11:49 +0800
Tag:    v2.1.2

MDL-28202 qtype_calculated fix edge case in the rounding code.