Handle another exception from some versions of dateutil.parser

nilmdb/utils/time.py

@@ -87,7 +87,7 @@ def parse_time(toparse):
     try:
         return unix_to_timestamp(datetime_tz.datetime_tz.
                                  smartparse(toparse).totimestamp())
-    except (ValueError, OverflowError):
+    except (ValueError, OverflowError, TypeError):
         pass
 
     # If it's parseable as a float, treat it as a Unix or NILM