WavDecoder don't support bit depth greater than 16

[Rodrigodd]

The WavDecoder uses hound to decode the WAV to i16 samples, but hound return a Result that errors when the target format is smaller than the bit depth of the file, or is in the wrong format (float vs int). audio-engine is currently unwrapping this Result and panicking.

audio-engine should not panic. Should at least decode the samples as i32 or f32 and convert them to i16 (and ideally support more sample formats).

Relevant source code:

audio-engine/src/wav.rs

Lines 36 to 48 in b256adb

	#[allow(clippy::needless_range_loop)]
	fn write_samples(&mut self, buffer: &mut [i16]) -> usize {
	let mut samples = self.reader.samples::<i16>();
	for i in 0..buffer.len() {
	if let Some(sample) = samples.next() {
	buffer[i] = sample.unwrap();
	} else {
	return i;
	}
	}
	buffer.len()
	}

[Rodrigodd]

@markusmoenig Fixed on 0.3.0 by 775e7e5.