Research and fix weird indexoutofbounds bug

[ewjmulder]

2018-10-14 20:54:09 [main] ImmerseServer.handleClient() - INFO: Client connected, requested action: PLAY_SCENARIO
2018-10-14 20:54:09 [Main Mixer Worker] ImmerseMixer.logScenarioEvent() - INFO: Main mixer started scenario lightning.wav
2018-10-14 20:54:09 [main] ImmerseServer.handleClient() - INFO: Client connected, requested action: WAIT_FOR_PLAYBACK
2018-10-14 20:54:09 [Main Mixer Worker] ImmerseMixer.run() - WARNING: Risk for hickups in playback: actual step millis 5.699465 was bigger than the step pace millis 5.
2018-10-14 20:54:09 [pool-1-thread-25] LogUtil.logExceptions() - ERROR: Exception during asynchronous task: java.lang.IndexOutOfBoundsException
at java.io.BufferedInputStream.read(BufferedInputStream.java:338)
at sun.net.www.MeteredStream.read(MeteredStream.java:134)
at java.io.FilterInputStream.read(FilterInputStream.java:133)
at sun.net.www.protocol.http.HttpURLConnection$HttpInputStream.read(HttpURLConnection.java:3393)
at javax.sound.sampled.AudioInputStream.read(AudioInputStream.java:292)
at com.programyourhome.immerse.audiostreaming.mixer.AudioInputStreamWrapper.read(AudioInputStreamWrapper.java:49)
at com.programyourhome.immerse.audiostreaming.mixer.scenario.AudioInputBuffer.fill(AudioInputBuffer.java:174)
at com.programyourhome.immerse.audiostreaming.mixer.step.MixerStep.lambda$readBytes$3(MixerStep.java:230)
at com.programyourhome.immerse.audiostreaming.util.LogUtil.logExceptions(LogUtil.java:12)
at com.programyourhome.immerse.audiostreaming.util.AsyncUtil.lambda$submitAsyncTask$0(AsyncUtil.java:18)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)