Slave unicast bug fix.

Core/Src/NbusBridge.cpp

@@ -218,7 +218,7 @@ void NbusBridge::_processSlaveRequest(uint8_t *rx_frame, uint8_t size)
     }
     else
     {
-    	_worker_frame_ptr = _forwardPacket(rx_frame, size);
+    	_worker_frame_ptr = _communicator->sendAndReceiveSlave(_forwardPacket(rx_frame, size));
     }
 
     _communicator->sendToMaster(_worker_frame_ptr);