L2SS-244: Improved comment

devices/clients/StatisticsPacket.py

@@ -29,7 +29,7 @@ class StatisticsPacket(object):
     def __init__(self, packet: bytes):
         self.packet = packet
 
-        # Only parse valid packets
+        # Only parse valid statistics packets from SDP, reject everything else
         if type(self.marker) == bytes or self.marker not in 'SBX':
             raise ValueError("Invalid SDP statistics packet: packet marker (first byte) is '{}', not one of 'SBX'.".format(self.marker))