Author: Jetha Chan
MDL-23912 core_comment: update count after deletion
http://git.moodle.org/gw?p=moodle.git;a=commit;h=31830a539d4d263e6b4ac1f42210a6ff84fbfb41
http://github.com/moodle/moodle/commit/31830a539d4d263e6b4ac1f42210a6ff84fbfb41
+ 2.8 en [commentscount,core]