Don't create an edit link to a non-UI post type in the media list table.

props johnbillion.
fixes #20453.

Built from https://develop.svn.wordpress.org/trunk@25140


git-svn-id: http://core.svn.wordpress.org/trunk@25120 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/includes/class-wp-media-list-table.php

@@ -301,11 +301,17 @@ function display_rows() {
 		break;
 
 	case 'parent':
-		if ( $post->post_parent > 0 && get_post( $post->post_parent ) ) {
+		if ( $post->post_parent > 0 )
+			$parent = get_post( $post->post_parent );
+		else
+			$parent = false;
+
+		if ( $parent ) {
 			$title = _draft_or_post_title( $post->post_parent );
+			$parent_type = get_post_type_object( $parent->post_type ); 
 ?>
 			<td <?php echo $attributes ?>><strong>
-				<?php if ( current_user_can( 'edit_post', $post->post_parent ) ) { ?>
+				<?php if ( current_user_can( 'edit_post', $post->post_parent ) && $parent_type->show_ui ) { ?>
 					<a href="<?php echo get_edit_post_link( $post->post_parent ); ?>">
 						<?php echo $title ?></a><?php
 				} else {