fix a bug of tiny_ssim to handle odd frame sizes
fix a bug of tiny_ssim to handle odd frame sizes

Change-Id: Id8ef0eb211517a8f8ec764ec398d16efb9320540

ShiftMediaProject/libvpx,ShiftMediaProject/libvpx,ShiftMediaProject/libvpx,webmproject/libvpx,webmproject/libvpx,webmproject/libvpx,webmproject/libvpx,webmproject/libvpx,ShiftMediaProject/libvpx,webmproject/libvpx,ShiftMediaProject/libvpx