Author: Yuliya Bozhko
MDL-43978 badges: Display error message to guest users viewing "My Badges" page
http://git.moodle.org/gw?p=moodle.git;a=commit;h=256731fd39743bb2e15bb93009ac68fe233f37f1
http://github.com/moodle/moodle/commit/256731fd39743bb2e15bb93009ac68fe233f37f1
+ 2.6 en [error:guestuseraccess,core_badges]