message: Remove no longer needed toElement() call
  The for loop will now only iterate over Elements, rather than the Node
  base type.
diff: @@ -131,10 +131,8 @@ namespace
  {
  Planet::Attributes attributes;
  - for (const auto* node = xmlNode->firstChildElement(); node; node = node->nextSiblingElement())
  + for (const auto* element = xmlNode->firstChildElement(); element; element = element->nextSiblingElement())
  {
  - const auto* element = node->toElement();
  -
  if (element->value() == "PlanetType")
  {
  parseElementValue(attributes.type, element);
  