cancel button for analysis page

core/src/zero1hd/rhythmbullet/audio/analyzer/AudioAnalyzer.java

@@ -34,7 +34,7 @@ public class AudioAnalyzer implements Disposable {
 		exec.submit(pdr);
 	}
 	
-	public void stop() {
+	private void stop() {
 		sfar.work = false;
 		tcr.work = false;
 		pfr.work = false;