#83225 by Heine. Remove an extra theme('placeholder').

themes/engines/phptemplate/phptemplate.engine

@@ -380,7 +380,7 @@ function _phptemplate_default($hook, $variables, $suggestions = array(), $extens
       }
       else {
         $variables['hook'] = $hook;
-        watchdog('error', t('%engine.engine was instructed to override the %name theme function, but no valid template file was found.', array('%engine' => $theme_engine, '%name' => theme('placeholder', $hook))));
+        watchdog('error', t('%engine.engine was instructed to override the %name theme function, but no valid template file was found.', array('%engine' => $theme_engine, '%name' => $hook)));
         $file = "themes/engines/$theme_engine/default$extension";
       }
     }