message: Use ArgsManager::GetPathArg() for "-blocksdir" option
diff: @@ -416,7 +416,7 @@ const fs::path& ArgsManager::GetBlocksDirPath() const
  if (!path.empty()) return path;
  if (IsArgSet("-blocksdir")) {
  - path = fs::absolute(fs::PathFromString(GetArg("-blocksdir", "")));
  + path = fs::absolute(GetPathArg("-blocksdir"));
  if (!fs::is_directory(path)) {
  path = "";
  return path;
  