fix progress callback for massive files by avoiding integer overflow
fix progress callback for massive files by avoiding integer overflow
nakijun/vtp,seanisom/vtp,seanisom/vtp,seanisom/vtp,markraz/vtp,markraz/vtp,nakijun/vtp,nakijun/vtp,seanisom/vtp,nakijun/vtp,nakijun/vtp,seanisom/vtp,markraz/vtp,markraz/vtp,markraz/vtp