Error in first_login_user_login

I was getting the error when logging in with an existing user created before first_login was installed:

Notice: Undefined index: first_login in first_login_user_login() (line 96 of <path_to_drupal>/sites/all/modules/contrib/first_login/first_login.module).

This was resolved by changing out:

    if ($account->data['first_login'] ===TRUE && isset($account->data['first_login']['count']) && $first_login['count'] > variable_get('first_login_num_of_logins', 1)) {
      $first_login['status'] = FALSE;
    }

with

    if (!empty($account->data['first_login']) && isset($account->data['first_login']['count']) && $first_login['count'] > variable_get('first_login_num_of_logins', 1)) {
      $first_login['status'] = FALSE;
    }

Patch attached.