Return an empty stdClass from wp_count_posts() when a nonexistent post type is requested.

props johnpbloch.
fixes #24803.



git-svn-id: http://core.svn.wordpress.org/trunk@24826 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/post.php

@@ -2042,6 +2042,9 @@ function unstick_post($post_id) {
 function wp_count_posts( $type = 'post', $perm = '' ) {
 	global $wpdb;
 
+	if ( ! post_type_exists( $type ) )
+		return new stdClass;
+
 	$user = wp_get_current_user();
 
 	$cache_key = $type;