message: Rename structure to structureElement
diff: @@ -419,20 +419,20 @@ void StructureManager::serialize(NAS2D::Xml::XmlElement* element)
  for (auto it = mStructureTileTable.begin(); it != mStructureTileTable.end(); ++it)
  {
  - auto* structure = new NAS2D::Xml::XmlElement("structure");
  - serializeStructure(structure, it->first, it->second);
  + auto* structureElement = new NAS2D::Xml::XmlElement("structure");
  + serializeStructure(structureElement, it->first, it->second);
  if (it->first->isFactory())
  {
  - structure->attribute("production_completed", static_cast<Factory*>(it->first)->productionTurnsCompleted());
  - structure->attribute("production_type", static_cast<Factory*>(it->first)->productType());
  + structureElement->attribute("production_completed", static_cast<Factory*>(it->first)->productionTurnsCompleted());
  + structureElement->attribute("production_type", static_cast<Factory*>(it->first)->productType());
  }
  if (it->first->isWarehouse())
  {
  auto* warehouse_products = new NAS2D::Xml::XmlElement("warehouse_products");
  static_cast<Warehouse*>(it->first)->products().serialize(warehouse_products);
  - structure->linkEndChild(warehouse_products);
  + structureElement->linkEndChild(warehouse_products);
  }
  if (it->first->isRobotCommand())
  @@ -449,17 +449,17 @@ void StructureManager::serialize(NAS2D::Xml::XmlElement* element)
  }
  robotsElement->attribute("robots", str.str());
  - structure->linkEndChild(robotsElement);
  + structureElement->linkEndChild(robotsElement);
  }
  if (it->first->structureClass() == Structure::StructureClass::FoodProduction)
  {
  auto* food = new NAS2D::Xml::XmlElement("food");
  food->attribute("level", static_cast<FoodProduction*>(it->first)->foodLevel());
  - structure->linkEndChild(food);
  + structureElement->linkEndChild(food);
  }
  - structures->linkEndChild(structure);
  + structures->linkEndChild(structureElement);
  }
  element->linkEndChild(structures);
  