loop sometimes returns positive when there was no data

[Karl Palsson]

and when it does, it starts doing it over and over again....

[Karl Palsson]

This is the fix for now: karlp@08d4638

I'll try and finish tidying some stuff up for a proper pull request one of these days :)

[Stéphane Raimbault]

Your fork contains many interesting things, I'm waiting for a pull request :)
In the meantime, I've applied your fix.