if ($tpl_var != '' && isset($value)) {
                if (!isset($this->tpl_vars[$tpl_var])) {
                    $tpl_var_inst = $this->getVariable($tpl_var, null, true, false);
                    if ($tpl_var_inst instanceof Undefined_Smarty_Variable) {
                        $this->tpl_vars[$tpl_var] = new Smarty_variable(null, $nocache);