bufferOverlap is unused in PercussionOnsetDetector constructor

[fstanis]

It seems one of the constructors for PercussionOnsetDetector has a bufferOverlap parameter, but it's not actually used anywhere:

TarsosDSP/src/core/be/tarsos/dsp/onsets/PercussionOnsetDetector.java

Lines 123 to 127 in d958352

	public PercussionOnsetDetector(float sampleRate, int bufferSize,
	int bufferOverlap, OnsetHandler handler) {
	this(sampleRate, bufferSize, handler,
	DEFAULT_SENSITIVITY, DEFAULT_THRESHOLD);
	}