Document graph widget

src/gui/widgets/Graph.cpp

@@ -635,13 +635,14 @@ void graphModel::smoothNonCyclic()
 	emit samplesChanged(0, length()-1);
 }
 
-//makes a cyclic convolution.
-void graphModel::convolve(const float *convolution, const int convolutionLength, const int centerOffset)
+void graphModel::convolve(const float *convolution,
+	const int convolutionLength, const int centerOffset)
 {
 	// store values in temporary array
 	QVector<float> temp = m_samples;
 	const int graphLength = length();
 	float sum;
+	// make a cyclic convolution
 	for ( int i = 0; i <  graphLength; i++ )
 	{
 		sum = 0;