Author: Mark Nelson
MDL-55062 tool_uploaduser: prevent defaults when not selected
http://git.moodle.org/gw?p=moodle.git;a=commit;h=a57a9053d78277cd3f50409fef51498f50bcaf6b
http://github.com/moodle/moodle/commit/a57a9053d78277cd3f50409fef51498f50bcaf6b
+ 3.2 en [invalidupdatetype,tool_uploaduser]