wrong variable name setting in comment_notify_get_user_node_notify_preference

Hello,

thank you for this module !
I have a notice "Trying to get property of non-object in comment_notify_get_user_node_notify_preference()"

This is actuel code:

function comment_notify_get_user_node_notify_preference($uid) {
  $setting = comment_notify_get_user_notification_setting($uid);
  if (!$setting) {
    $settings = comment_notify_get_default_notification_setting();
  }
  return $setting->node_notify;
}

After fix, I just rename the variable (settings->setting) :

function comment_notify_get_user_node_notify_preference($uid) {
  $setting = comment_notify_get_user_notification_setting($uid);
  if (!$setting) {
    $setting = comment_notify_get_default_notification_setting();
  }
  return $setting->node_notify;
}

I do a patch for this right now.