debug log nonzero backlog

whisper-2023/hotwords.py

@@ -113,7 +113,9 @@ class Parser(threading.Thread):
       while True:
          try:
             if environ.get("DEBUG", None):
-               log(self.inq.qsize())
+               backlog = self.inq.qsize()
+               if backlog:
+                  log("Parser.run backlog", backlog)
             clip = self.inq.get()
             if clip is None:
                break