Pages: get_page_uri() should return the URI at which the resource being accessed is available at, this may include non-'publish' status posts.

Reverts [34001] and fixes the original issue in #15963 - avoiding a PHP Notice for when the post doesn't exist.

Props tharsheblows.
See #15963.
Fixes #35084.


git-svn-id: https://develop.svn.wordpress.org/trunk@36094 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/post.php

@@ -4300,7 +4300,7 @@ function get_page_uri( $page ) {
 
 	foreach ( $page->ancestors as $parent ) {
 		$parent = get_post( $parent );
-		if ( 'publish' === $parent->post_status ) {
+		if ( $parent ) {
 			$uri = $parent->post_name . '/' . $uri;
 		}
 	}