Asking for samples that are the same duration as the data fails

[justinsalamon]

If your data has n_frames and you ask for samples that are n_frames long:

pump.sampler(max_samples, n_frames, random_state=seed)

It will crash, because of this line: since you can't call randint(0,0).
Beyond crashing, I think there's an off-by-one error here: if the data is of size D and you ask for samples of N frames, then the range of valid start indices is [0, D-N] (including D-N), not [0, D-N).

Suggested fix: update line 139 in sample.py as such:

yield self.rng.randint(0, duration - self.duration + 1)