Fixing a memory leak from not deallocating audio data pointer (#38)

* Fixing a memory leak from not deallocating audio data pointer

* Moved the deallocation of theData to the end

* cleaned up unneeded deallocation in 164

Author: maweibezahn

Sources/SoundpipeAudioKit/Generators/PhaseLockedVocoder.swift

@@ -160,10 +160,11 @@ public class PhaseLockedVocoder: Node {
                     au.setWavetable(data: data, size: Int(ioNumberFrames))
                 } else {
                     // failure
-                    theData?.deallocate()
-                    theData = nil // make sure to return NULL
                     Log("Error = \(err)"); break Exit
                 }
+                // Fixing a previous memory leak
+                theData?.deallocate()
+                theData = nil
             }
         }
     }