zero parameter for the post_comments shortcode

Syntax

[post_comments
after="| text - After output link"
before="| text - Before output link"
hide_if_off="1| false - Hide link if comments are off"
more="% Comments| text - Text when there is more than one comment"
one="1 Comment| text - Text when there is exactly one comment"
zero="Leave a Comment| text - Text when there are no comments"]