try it this way

diff --git a/include/classes/rrdstat.php-class b/include/classes/rrdstat.php-class
index 1c2306bb56f294f43a3743f1cf381cbc1ea50b8c..74b5b5c4116153fcd34f12813fced0f689ae235e 100644 (file)
--- a/include/classes/rrdstat.php-class
+++ b/include/classes/rrdstat.php-class
@@ -157,7 +157,7 @@ class rrdstat {
         $upvals = explode("\n", ob_get_contents());
         ob_end_clean();
       }
-      $walkfunc = create_function('&$val', 'return (is_numeric($val)?$val:"U");');
+      $walkfunc = create_function('&$val', '$val = is_numeric($val)?$val:"U";');
       array_walk($upvals, $walkfunc);
     }
     else {