Author: Rajesh Taneja
MDL-30421 forum: resolved error in single discussion forum, if more then one record is present
http://git.moodle.org/gw?p=moodle.git;a=commit;h=35b81f27ca62ebc12ab5b5f5324da86f657428d6
http://github.com/moodle/moodle/commit/35b81f27ca62ebc12ab5b5f5324da86f657428d6
+ 2.2 en [warnformorepost,mod_forum]