Improve (well, fix) the SC process-wait-query-action code for NMF

release-packaging/Classes/FluidBufNMF.sc

@@ -20,7 +20,6 @@ FluidBufNMF : UGen {
 
     *process { |server,  source, startFrame = 0, numFrames = -1, startChan = 0, numChans = -1, destination, bases, basesMode = 0, activations, actMode = 0, components = 1, iterations = 100, windowSize = 1024, hopSize = -1, fftSize = -1, windowType = 0, randomSeed = -1, action|
 
-        var synth;
         source = source.asUGenInput;
         destination = destination.asUGenInput;
         bases = bases.asUGenInput;
@@ -32,9 +31,8 @@ FluidBufNMF : UGen {
         bases = bases ? -1;
         activations = activations ? -1;
 
-        synth = {FluidBufNMF.kr(source, startFrame, numFrames, startChan, numChans, destination, bases, basesMode, activations, actMode, components, iterations, windowSize, hopSize, fftSize, doneAction: Done.freeSelf)}.play(server);
+        forkIfNeeded{
-
+            {FluidBufNMF.kr(source, startFrame, numFrames, startChan, numChans, destination, bases, basesMode, activations, actMode, components,iterations, windowSize, hopSize, fftSize, doneAction: Done.freeSelf)}.play(server).waitForFree;
-        synth.waitForFree({ forkIfNeeded{
             server.sync;
             if (destination != -1) {
                 destination = server.cachedBufferAt(destination);
@@ -52,6 +50,6 @@ FluidBufNMF : UGen {
                 server.sync;
             } {activations = nil};
             action.value(destination, bases, activations);
-        }});
+        };
     }
 }