fix clicking when low cut set to 0

don't process band 0, since that's just the DC offset,
so it by definition does not have a phase, and processing it just introduces
jumps in the waveform, heard as constant periodic clicking

vocalrediso.jsfx

@@ -48,8 +48,8 @@ phaseWhigh = slider9*$pi/180;
 cosine = cos(rotation);
 sine = sin(rotation);
 // fill strengthBuffer and phaseWBuffer
-bandIndex = 0;
-loop(SIZE,
+bandIndex = 1;
+loop(SIZE-1,
 	bandIndex >= lowBin && bandIndex < highBin ?
 	(
 		// only set values for the appropriate frequency range