Protobuf format argument now properly streaming out protobuf binary

Author: GenoJAFord

openxc/sources/base.py

@@ -40,6 +40,7 @@ def __init__(self, callback=None, log_mode=None, payload_format=None):
         self._streamer = None
         self._formatter = None
         self._format = payload_format
+        self.format = payload_format  # Added 7/30/2021 to fix protobuf streaming out
 
         self.logger = SourceLogger(self, log_mode)