363,365c363,367
<   foreach ($options as $nid => $value) {
<     if ($nid > 0 && !isset($permitted_nids[$nid])) {
<       unset($options[$nid]);
---
>   if ($options) {
>     foreach ($options as $nid => $value) {
>       if ($nid > 0 && !isset($permitted_nids[$nid])) {
>         unset($options[$nid]);
>       }