Fix check of metastream in numeric scheme

src/AsapoWorker/streamer.py

@@ -77,7 +77,7 @@ def get_new_stream(stream, receiver_stream_list, metadata_stream_list,
         max_stream_number = max_stream(receiver_stream_list)
         try:
             if (int(stream) < max_stream_number
-                    and str(max_stream_number) in metadata_stream_list):
+                    and str(int(stream) + 1) in metadata_stream_list):
                 return str(int(stream) + 1)
         except ValueError:
             log.warning(