Don't print error if zero samples are decoded

src/audio/omx.c

@@ -203,7 +203,7 @@ static void omx_renderer_decode_and_play_sample(char* data, int length) {
     if (r != OMX_ErrorNone) {
       fprintf(stderr, "Empty buffer error\n");
     }
-  } else {
+  } else if (decodeLen < 0) {
     printf("Opus error from decode: %d\n", decodeLen);
   }
 }

src/audio/pulse.c

@@ -101,7 +101,7 @@ static void pulse_renderer_decode_and_play_sample(char* data, int length) {
 
     if (rc<0)
       printf("Pulseaudio error: %s\n", pa_strerror(error));
-  } else {
+  } else if (decodeLen < 0) {
     printf("Opus error from decode: %d\n", decodeLen);
   }
 }

src/audio/sdl.c

@@ -82,7 +82,7 @@ static void sdl_renderer_decode_and_play_sample(char* data, int length) {
   int decodeLen = opus_multistream_decode(decoder, data, length, pcmBuffer, samplesPerFrame, 0);
   if (decodeLen > 0) {
     SDL_QueueAudio(dev, pcmBuffer, decodeLen * channelCount * sizeof(short));
-  } else {
+  } else if (decodeLen < 0) {
     printf("Opus error from decode: %d\n", decodeLen);
   }
 }