253 Undefined indexes fix

After a fresh install, in Dashboard > Caching > Expires, noticed many (253) red entries shown in the Query Monitor plugin, like that one below:

Notice	Undefined index: default
wp-content/plugins/http-headers/views/expires.php:93
Plugin: http-headers

The quick-fix that worked for me, changing this:
?><option value="<?php echo $k; ?>"<?php selected($expires_value[$type], $k); ?>><?php echo $v; ?></option><?php
to this:

$val_type = !empty($expires_value[$type]) ? $expires_value[$type] : '';
?><option value="<?php echo $k; ?>"<?php selected($val_type, $k); ?>><?php echo $v; ?></option><?php

Thanks for the very useful plugin!