I can't get the cloud percent for forecast.io

[santonoreg]

When I use the weather.clouds.getPerc() to get cloud percent I always receive a zero value. I saw that this method is declared as int but the documentation from forecast.io says: "cloudCover: A numerical value between 0 and 1 (inclusive) representing the percentage of sky occluded by clouds".
Maybe this is the problem. Can you fix that?

Thanks for your perfect work!