default value of 'FALSE' becomes '' (empty string) in _protected_node_save during database insert (mysql PDO)

Hi --

While attempting to enable the protected node module on an existing site, I was encountering the following error:

PDOException: SQLSTATE[HY000]: General error: 1366 Incorrect integer value: '' for column 'protected_node_is_protected' at row 1: INSERT INTO {protected_nodes} (protected_node_is_protected, protected_node_passwd, protected_node_show_title, nid, protected_node_hint) VALUES (:db_insert_placeholder_0, :db_insert_placeholder_1, :db_insert_placeholder_2, :db_insert_placeholder_3, :db_insert_placeholder_4); Array ( [:db_insert_placeholder_0] => [:db_insert_placeholder_1] => [:db_insert_placeholder_2] => 0 [:db_insert_placeholder_3] => 2771 [:db_insert_placeholder_4] => ) in _protected_node_save() (line 748 of /home/poetryinvoice.com/www/trunk/sites/all/modules/protected_node/protected_node.module).

From that error, I can see that the default value being set for protected_node_is_protected in protected_node_load is 'FALSE'.
So, when it comes time to do the insert, FALSE is converted to the php string value of '' (empty string), which causes mysql to have a fit.

I've fixed this issue on my side by changing the default for protected_node_is_protected to 0, rather that FALSE.
I don't think this should cause any side effects anywhere (I think it would only cause problems if there was a protected_node_is_protected === FALSE condition somewhere... which there does not appear to be).

  static $default_fields = array(
      'protected_node_is_protected' => 0,
      'protected_node_passwd' => '',
      'protected_node_passwd_changed' => 0,
      'protected_node_show_title' => 0,
      'protected_node_hint' => '',
    );

Alternatively, converting the protected_node_is_protected parameter to an integer before passing it to PDO should work too, I think:

 $nid = db_insert('protected_nodes')
      ->fields(array(
        'protected_node_is_protected' => intval($node->protected_node_is_protected),
        'protected_node_passwd' => $node->protected_node_passwd,
        'protected_node_show_title' => $node->protected_node_show_title,
        'nid' => $node->nid,
        'protected_node_hint' => isset($node->protected_node_hint) ? $node->protected_node_hint : '',
      ))
      ->execute();

Not sure why I'm the only one seeing this issue. I guess it only comes up in certain cases (when adding to an existing site?).
thanks