- bugfix of problem introduced with r4342 on math plugin

change_log.txt

@@ -1,6 +1,7 @@
 ===== trunk  =====
 04.10.2011
 - bugfix assign() in plugins called in subtemplates did change value also in parent template
+- bugfix of problem introduced with r4342 on math plugin 
 
 ===== Smarty-3.1.2  =====
 03.10.2011

libs/plugins/function.math.php

@@ -55,7 +55,7 @@ function smarty_function_math($params, $template)
     foreach($params as $key => $val) {
         if ($key != "equation" && $key != "format" && $key != "assign") {
             // make sure value is not empty
-            if (isset($val[0])) {
+            if (strlen($val)==0) {
                 trigger_error("math: parameter $key is empty",E_USER_WARNING);
                 return;
             }