Author: Ankit Kumar Agarwal
MDL-26890 Forums check on filesize if the file is added to the forum from private area
http://git.moodle.org/gw?p=moodle.git;a=commit;h=c0d60b3a3f5dcfe0f3f4ef53be5da0e5d1ae4b19
http://github.com/moodle/moodle/commit/c0d60b3a3f5dcfe0f3f4ef53be5da0e5d1ae4b19
+ 2.2 en [filesizenull,core_repository]