Finally support changing FFT size. This however doesn't now use the double stretch source thing, so glitches will probably happen... Parameter component was changed to support changing the parameter value only on mouse releasee etc

Source/PS_Source/StretchSource.cpp

@@ -437,10 +437,11 @@ void StretchAudioSource::setFFTWindowingType(int windowtype)
 void StretchAudioSource::setFFTSize(int size)
 {
     jassert(size>0);
-    if (size != m_process_fftsize)
+    if (m_process_fftsize == 0 || size != m_process_fftsize)
 	{
 		m_process_fftsize = size;
-		
+		initObjects();
+		++m_param_change_count;
 	}
 }