Default notification state when notification is disabled

Currently when you set the notifications state to "No notifications", and the user then clicks the checkbox to enable notifications, the notification state will always be set to "All Comments". This is because in the code, it is hardcoded:

$form['notify_settings']['notify_type'] = array(
    '#type' => 'radios',
    '#options' => $available_options,
    '#default_value' => $preference ? $preference : 1,
  );

Note the default value is set to 1 if notification state is disabled. A simple option would be refector the notification state options as follows:

No Notification::All Comments
No Notification::Replies to my comments
Notification::All Comments
Notification::Replies to my comments

or the section option is to refector the settings into two separate values.

In the meantime, for those of you who want to make "Replies to my comments" the default when notification are initially disabled, then change to above code to:

'#default_value' => $preference ? $preference : 2,