improved assignment operator to not do unnecessary Clone
improved assignment operator to not do unnecessary Clone

nakijun/vtp,markraz/vtp,markraz/vtp,seanisom/vtp,nakijun/vtp,markraz/vtp,seanisom/vtp,seanisom/vtp,seanisom/vtp,nakijun/vtp,seanisom/vtp,nakijun/vtp,markraz/vtp,nakijun/vtp,markraz/vtp