Optimization for Smarty_Internal_Data::assign()

Removed the extra if block, when an array has been given as the $tpl_var argument, because in the else block there is already a "not empty check".

libs/sysplugins/smarty_internal_data.php

@@ -95,10 +95,8 @@ class Smarty_Internal_Data
     {
         if (is_array($tpl_var)) {
             foreach ($tpl_var as $_key => $_val) {
-                if ($_key != '') {
                 $this->assign($_key, $_val, $nocache);
             }
-            }
         } else {
             if ($tpl_var != '') {
                 if ($this->_objType == 2) {