Update classic_modbusdecoder.py

Author: graham22

code/Python/support/classic_modbusdecoder.py

@@ -18,7 +18,7 @@
 
 from pymodbus.constants import Endian
 from pymodbus.client import ModbusTcpClient as ModbusClient
-from Payload import BinaryPayloadDecoder
+from support.Payload import BinaryPayloadDecoder
 from collections import OrderedDict
 import logging
 import sys