Git commits in Moodle 2.4.5 by Adam Olley

commit 752fb7113d52dfa485e75666806a08cb2efcbc48
Author: Adam Olley <adam.olley@netspot.com.au>
Date:   Fri, 31 May 2013 07:59:56 +0800
Tag:    v2.4.5

MDL-39947 mod_forum: Add safety check to variable assignment when counting unread posts