Git commits in Moodle 2.5.2 by Ruslan Kabalin

commit f327285ab3c5fcf60659cdb100b640f538b447ba
Author: Ruslan Kabalin <r.kabalin@lancaster.ac.uk>
Date:   Wed, 31 Jul 2013 16:46:07 +0800
Tag:    v2.5.2

MDL-40947: Fix segmentation fault issue in get_fast_modinfo.

commit 6c1620163248841f677e771a568d99cc46626d13
Author: Ruslan Kabalin <r.kabalin@lancaster.ac.uk>
Date:   Mon, 29 Jul 2013 18:05:15 +0800
Tag:    v2.5.2

MDL-31226: quiz: Fix message for attempts built on previous.