og_user_roles_og() mistakenly deletes existing roles on 'user update' if not admin

hi,

typo in following code causes ALL preexisting roles to be lost for example when a user's status is changed from active=0 to active=1. this is because $rid hasn't been set. probably

og_user_roles_role_delete($nid, $uid, $rid);

should be changed to

og_user_roles_role_delete($nid, $uid, $default_admin_role);

case 'user update':
$default_admin_role = variable_get('og_user_roles_default_admin_role', 0);
$default_role = variable_get('og_user_roles_default_role', 0);
if ($default_admin_role > 0 && $default_admin_role != $default_role) {
// Grant role for new group admin.
if (isset($args['is_admin']) && $args['is_admin']) {
og_user_roles_role_add($nid, $uid, $default_admin_role);
}
// Delete role for obsolete group admin.
else {
og_user_roles_role_delete($nid, $uid, $rid);
}
}
break;