L2SS-244: Corrected packet size calculation

devices/clients/SDP_statistics.py

@@ -36,7 +36,7 @@ class StatisticsPacket(object):
     def expected_size(self) -> int:
         """ The size this packet should be (header + payload), according to the header. """
 
-        return 78 + self.nof_statistics_per_packet * self.nof_bytes_per_statistic
+        return 32 + self.nof_statistics_per_packet * self.nof_bytes_per_statistic
 
     @property
     def marker(self) -> str: