fix result filter on contest

git-svn-id: http://hustoj.googlecode.com/svn@2145 19ab8b60-bd6c-11dd-baed-41e496641fac
fix from github

git-svn-id: http://hustoj.googlecode.com/svn@2146 19ab8b60-bd6c-11dd-baed-41e496641fac