bug: Character count display minus value

Hello CF7 Team,
I have check options for “[count your-message-2 down]”.
When we have not set any length in Input display count value in minus.

I thinks this count display when we have set a “maxlength” option.

http://i.imgur.com/7iq34zU.png

Thanks,
Ravi patel

https://wordpress.org/plugins/contact-form-7/