From bfef727df3f8de0e8808e36476e8c0ac1d890562 Mon Sep 17 00:00:00 2001
From: Sergey Biryukov <sergeybiryukov.ru@gmail.com>
Date: Mon, 17 Mar 2014 15:33:15 +0000
Subject: [PATCH] Avoid PHP notices in Media Library if an attachment parent
 post type no longer exists.

props wpsmith.
fixes #27439.
Built from https://develop.svn.wordpress.org/trunk@27560


git-svn-id: http://core.svn.wordpress.org/trunk@27403 1a063a9b-81f0-0310-95a4-ce76da25c4cd
---
 wp-admin/includes/class-wp-media-list-table.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/wp-admin/includes/class-wp-media-list-table.php b/wp-admin/includes/class-wp-media-list-table.php
index c9df68629e..48e4363980 100644
--- a/wp-admin/includes/class-wp-media-list-table.php
+++ b/wp-admin/includes/class-wp-media-list-table.php
@@ -329,7 +329,7 @@ foreach ( $columns as $column_name => $column_display_name ) {
 			$parent_type = get_post_type_object( $parent->post_type );
 ?>
 			<td <?php echo $attributes ?>><strong>
-				<?php if ( current_user_can( 'edit_post', $post->post_parent ) && $parent_type->show_ui ) { ?>
+				<?php if ( current_user_can( 'edit_post', $post->post_parent ) && $parent_type && $parent_type->show_ui ) { ?>
 					<a href="<?php echo get_edit_post_link( $post->post_parent ); ?>">
 						<?php echo $title ?></a><?php
 				} else {