Author: Jetha Chan
MDL-23912 core_comment: update count after deletion
http://git.moodle.org/gw?p=moodle.git;a=commit;h=d31e71b0d5e56da19984e940d64a696044e8a804
http://github.com/moodle/moodle/commit/d31e71b0d5e56da19984e940d64a696044e8a804
+ 2.7 en [commentscount,core]