Ticket #20891: 20891.diff

wp-admin/includes/post.php

@@ -1164 +1164 @@
                 $content_width = $old_content_width;
         }
 
-        return apply_filters( 'admin_post_thumbnail_html', $content );
+        return apply_filters( 'admin_post_thumbnail_html', $content, $post_id );
 }
 
 /**