Slight error in function the_post_font_icon on line 224

Version 1.0 from 12/2014:
$id = ( null === $id ) ? $post->ID : $post_id;

Should that be:
$id = ( null === $id ) ? $post->ID : $id;

Thanks and clever plugin!

https://www.ads-software.com/plugins/post-featured-font-icon/