Fix build failure

src/VehicleSetup/FirmwareUpgradeController.cc

@@ -286,7 +286,7 @@ void FirmwareUpgradeController::_initFirmwareHash()
         _rgPX4FMUV4Firmware.insert(FirmwareIdentifier(element.stackType, element.firmwareType, element.vehicleType), element.url);
     }
 
-    int size = sizeof(rgPX4FMV2FirmwareArray)/sizeof(rgPX4FMV2FirmwareArray[0]);
+    size = sizeof(rgPX4FMV2FirmwareArray)/sizeof(rgPX4FMV2FirmwareArray[0]);
     for (int i = 0; i < size; i++) {
         const FirmwareToUrlElement_t& element = rgPX4FMV2FirmwareArray[i];
         _rgPX4FMUV2Firmware.insert(FirmwareIdentifier(element.stackType, element.firmwareType, element.vehicleType), element.url);