message: Silence GCC over unused variable
diff: @@ -54,8 +54,9 @@ TechnologyCatalog::TechnologyCatalog(const std::string& techFile)
  const Technology& TechnologyCatalog::technologyFromId(int id) const
  {
  std::vector<Technology>::const_iterator it;
  - for (const auto& [categoryName, techList] : mCategories)
  + for (const auto& category : mCategories)
  {
  + const auto& techList = category.second;
  it = std::find_if(techList.begin(), techList.end(), [id](const Technology& tech) { return tech.id == id; });
  if (it != techList.end())
  