Fix two bugs for blank voice (empty speech): (#1403)

jianganghan

2024-02-29 f272eb4ef78e12a1ef4ae451b114f980a2682d51

 runtime/html5/static/wsconnecter.js

@@ -71,6 +71,7 @@
         "wav_name":  "h5",

         "is_speaking":  true,

         "chunk_interval":10,

         "itn":getUseITN(),

         "mode":getAsrMode(),

         

      };