Pass comment ID and comment post ID to get_comment_class() in WP_Comments_List_Table::single_row().

props drozdz.
fixes #25814.
Built from https://develop.svn.wordpress.org/trunk@26001


git-svn-id: http://core.svn.wordpress.org/trunk@25934 1a063a9b-81f0-0310-95a4-ce76da25c4cd