Seeking SamplesBuffer to position 0 panics

[AnteDeliria]

When seeking rodio::buffer::SamplesBuffer to Duration::from_secs(0), a panic occurs:

use rodio::nz;
use rodio::buffer::SamplesBuffer;
use std::time::Duration;
let mut buffer = SamplesBuffer::new(nz!(2), nz!(44100), vec![0.0, 0.0, 0.0, 0.0, 0.0, 0.0]);
buffer.next();
buffer.try_seek(Duration::from_secs(0));

Error message:

[windows] thread 'main' (23364) panicked at C:\Users\User\.cargo\registry\src\index.crates.io-1949cf8c6b5b557f\rodio-0.22.2\src\buffer.rs:116:23:
[windows] attempt to subtract with overflow

The line where it happens:

// make sure the next sample is for the right channel
let new_pos = new_pos.next_multiple_of(self.channels().get() as usize);
let new_pos = new_pos - curr_channel;

It looks like curr_channel is being subtracted from new_pos, which in this case is equal to 0, causing an underflow.

[roderickvd]

Good finding. In parallel we also spotted it at #903, where it's being fixed.

@yara-blue up to you if you want to apply this fix to current master or go with the audio pipeline refactor right away.