Zero price not working as expected

Hi Sean,

Thanks for the great plugin!

I’ve hit a minor issue. Most of my users will want to get the download for free, so ‘0’ is an often entered amount.

The plugin reads ‘0,00’ correctly, and even ‘0,0’ but not ‘0’. If you enter ‘0’, then it charges the default price.

Is this possible to fix?

Thanks,

Tom

http://wordpress.org/plugins/shatner-name-your-own-price-for-woocommerce/