message: Removed a redundant BuildTree function.
diff: @@ -658,8 +658,6 @@ Group &IO::GetGroup(const std::string &path, char delimiter)
  {
  m_Gr = new Group(path, delimiter, *this);
  m_Gr->BuildTree();
  - m_Gr->BuildTree();
  -
  return *m_Gr;
  }
  Engine &IO::GetEngine(const std::string &name)
  