Ticket #19858: 19858.diff

wp-includes/comment.php

@@ -1978 +1978 @@
         if ( empty( $posts ) || ! $query->is_singular() || ! get_option( 'close_comments_for_old_posts' ) )
                 return $posts;
 
-        $post_types = apply_filters( 'close_comments_for_post_types', array( 'post' ) );
+        $post_types = apply_filters( 'close_comments_for_post_types', array( 'post', 'attachment' ) );
         if ( ! in_array( $posts[0]->post_type, $post_types ) )
                 return $posts;
 
@@ -2017 +2017 @@
 
         $post = get_post($post_id);
 
-        $post_types = apply_filters( 'close_comments_for_post_types', array( 'post' ) );
+        $post_types = apply_filters( 'close_comments_for_post_types', array( 'post', 'attachment' ) );
         if ( ! in_array( $post->post_type, $post_types ) )
                 return $open;