Git commits in Moodle 2.4.4 by Matt Petro

commit 7dc22c4ef19853bdaa49bae7e566a983ae974d0f
Author: Matt Petro <petro@engr.wisc.edu>
Date:   Tue, 16 Apr 2013 19:19:23 +0800
Tag:    v2.4.4

MDL-34403 mod quiz: fix error during enrolment