GCS_MAVLink: disable CANTester by default

libraries/GCS_MAVLink/GCS_Common.cpp

@@ -4060,7 +4060,7 @@ MAV_RESULT GCS_MAVLINK::handle_command_preflight_can(const mavlink_command_long_
             }
             case AP_CANManager::Driver_Type_CANTester: {
 // To be replaced with macro saying if KDECAN library is included
-#if (APM_BUILD_COPTER_OR_HELI || APM_BUILD_TYPE(APM_BUILD_ArduPlane) || APM_BUILD_TYPE(APM_BUILD_ArduSub)) && (HAL_MAX_CAN_PROTOCOL_DRIVERS > 1 && !HAL_MINIMIZE_FEATURES)
+#if (APM_BUILD_COPTER_OR_HELI || APM_BUILD_TYPE(APM_BUILD_ArduPlane) || APM_BUILD_TYPE(APM_BUILD_ArduSub)) && (HAL_MAX_CAN_PROTOCOL_DRIVERS > 1 && !HAL_MINIMIZE_FEATURES && HAL_ENABLE_CANTESTER)
                 CANTester *cantester = CANTester::get_cantester(i);
 
                 if (cantester != nullptr) {