message: Rename XmlNode instance from `robot` to `robotNode`
  This frees up the name `robot` for the variable of type `Robot`.
diff: @@ -248,10 +248,10 @@ void MapViewState::readRobots(Xml::XmlElement* element)
  int id = 0, type = 0, age = 0, production_time = 0, x = 0, y = 0, depth = 0, direction = 0;
  XmlAttribute* attribute = nullptr;
  - for (XmlNode* robot = element->firstChild(); robot; robot = robot->nextSibling())
  + for (XmlNode* robotNode = element->firstChild(); robotNode; robotNode = robotNode->nextSibling())
  {
  id = type = age = production_time = x = y = depth = direction = 0;
  - attribute = robot->toElement()->firstAttribute();
  + attribute = robotNode->toElement()->firstAttribute();
  while (attribute)
  {
  if (attribute->name() == "id") { attribute->queryIntValue(id); }
  