Fixed MTR.cc: fix model number checker in update_coniguration()

extensions/lib/MTR.cc

@@ -457,9 +457,9 @@ MTR::MTRError update_configuration( ModbusRTUMaster* mb, ModbusRTU::ModbusAddr s
 						    const std::string& mtrconfile,  int verb )
 {
 	std::string m = MTR::getModelNumber(mb, slaveaddr);
-	if( m != "MTR315Transducer" )
+	if( m != "MTR315Transducer" && m != "MTR3-3Transducer" )
 	{
-		cerr << "(mtr-setup): model number != 'MTR315Transducer' (read: " << m << ")" << endl;
+		cerr << "(mtr-setup): model number must be 'MTR315Transducer' or 'MTR3-3Transducer' (read: " << m << ")" << endl;
 		return mtrBadDeviceType;
 	}