ensure socket is open before sending event message

Author: brandonmwest

lib/main.js

@@ -66,7 +66,9 @@ let streamAudioToWebSocket = function (userMediaStream) {
         micStream.on('data', function(rawAudioChunk) {
             // the audio stream is raw audio bytes. Transcribe expects PCM with additional metadata, encoded as binary
             let binary = convertAudioToBinaryMessage(rawAudioChunk);
-            socket.send(binary);
+            
+            if (socket.OPEN)
+                socket.send(binary);
         }
     )};