Merge pull request jasperproject#328 from Holzhaus/fix-issue-327

witai-stt: small fix to check if result is empty

client/stt.py

@@ -610,7 +610,9 @@ def transcribe(self, fp):
                                   exc_info=True)
             return []
         else:
-            transcribed = [text.upper()]
+            transcribed = []
+            if text:
+                transcribed.append(text.upper())
             self._logger.info('Transcribed: %r', transcribed)
             return transcribed