little revision

Hi,
I found a small bug in https://github.com/bateman/corsaronero-cp-provider/blob/master/main.py#L117 In fact, nothing assures us that the next td is the good one.

I also believe that it would be a great idea if you submit the pull request with your work to RuudBurger for inclusion in the official repository.

![saluti](http://3.bp.blogspot.com/-Eg_4kg813VM/ULJIyO6TLyI/AAAAAAAADdc/ed_QXKoMMXc/s1600/captain-picard-waving.gif)