Fix node addon tests (#865)

* Install naudiodon2 manually.

It is needed only when using a microphone. The CI tests don't need it.

@@ -36,6 +36,9 @@ rm sherpa-onnx-streaming-zipformer-bilingual-zh-en-2023-02-20.tar.bz2
 
 node ./test_asr_streaming_transducer.js
 
+# To run the test with microphone, you need to install the package naudiodon2
+npm install naudiodon2
+
 node ./test_asr_streaming_transducer_microphone.js
 ```
 
@@ -44,6 +47,10 @@ node ./test_asr_streaming_transducer_microphone.js
 ```bash
 wget https://github.com/k2-fsa/sherpa-onnx/releases/download/asr-models/silero_vad.onnx
 
+
+# To run the test with microphone, you need to install the package naudiodon2
+npm install naudiodon2
+
 node ./test_vad_microphone.js
 ```
 

 {
   "dependencies": {
-    "naudiodon2": "^2.4.0",
     "perf_hooks": "*",
     "sherpa-onnx-node": "*"
   }

@@ -107,7 +107,7 @@ def get_piper_models() -> List[TtsModel]:
         TtsModel(model_dir="vits-piper-de_DE-eva_k-x_low"),
         TtsModel(model_dir="vits-piper-de_DE-karlsson-low"),
         TtsModel(model_dir="vits-piper-de_DE-kerstin-low"),
-        TtsModel(model_dir="vits-piper-de_DE-mls-medium"),
+        #  TtsModel(model_dir="vits-piper-de_DE-mls-medium"),
         TtsModel(model_dir="vits-piper-de_DE-pavoque-low"),
         TtsModel(model_dir="vits-piper-de_DE-ramona-low"),
         TtsModel(model_dir="vits-piper-de_DE-thorsten-high"),

@@ -35,10 +35,10 @@ console.log('Started')
 let start = performance.now();
 const stream = recognizer.createStream();
 const wave = sherpa_onnx.readWave(waveFilename);
-stream.acceptWaveform(wave.samples, wave.sampleRate);
+stream.acceptWaveform({samples: wave.samples, sampleRate: wave.sampleRate});
 
 const tailPadding = new Float32Array(wave.sampleRate * 0.4);
-stream.acceptWaveform(tailPadding, wave.sampleRate);
+stream.acceptWaveform({samples: tailPadding, sampleRate: wave.sampleRate});
 
 while (recognizer.isReady(stream)) {
   recognizer.decode(stream);

@@ -62,7 +62,7 @@ static void DecodeOne(const float *log_probs, int32_t num_rows,
 
       std::ostringstream os;
       int32_t prev_id = -1;
-      int32_t num_trailing_blanks = 0;
+      int32_t &num_trailing_blanks = result->num_trailing_blanks;
       int32_t f = 0;  // frame number
 
       for (auto i : isymbols_out) {