Undefined index

I just installed this plugin for the first time. On the “Show All Comments Settings” page I see a PHP Notice about an Undefined variable. Easy enough to fix. Would you mind updating bt-comments.php ? Perhaps delete lines 81, 75 – 77 and insert this one line at 75:

$checked = in_array("$post_type", $set_bt_post_type) ? ' checked="checked"' : '';

Thanks for this plugin! Very useful idea.