1271,1272c1271,1277
<               form_error($elements, $t('An illegal choice has been detected. Please contact the site administrator.'));
<               watchdog('form', 'Illegal choice %choice in !name element.', array('%choice' => $v, '!name' => empty($elements['#title']) ? $elements['#parents'][0] : $elements['#title']), WATCHDOG_ERROR);
---
>               if ($elements['#type'] != 'radios') {
>                 form_error($elements, $t('An illegal choice has been detected. Please contact the site administrator.'));
>                 watchdog('form', 'Illegal choice %choice in !name element.', array('%choice' => $v, '!name' => empty($elements['#title']) ? $elements['#parents'][0] : $elements['#title']), WATCHDOG_ERROR);
>               }
>               else {
>                 form_error($elements, $t('You must choose at least on radio button.'));
>               }