Correct rewrite tag for hierarchical post types without a query_var.

Hierarchical rewrite rules operate via the 'pagename' query variable which is
passed to get_page_by_path(). However, the current rewrite rules use the 'name'
query variable for hierarchical types without a custom query_var.

Fixes #16323.


git-svn-id: https://develop.svn.wordpress.org/trunk@25182 602fd350-edb4-49c9-b593-d223f7449a82