Clip_denoise, not clipping final sampling prediction

[ser5kovskiy]

Hello

Thank you for great work

I have noticed that using "--clip-denoise" flag does not provide final sampling prediction in [-1, 1]. It can be [-1.0029, 1.0026].
It may be not as it was planned.
It is fixed with just one more clamp_ over recon_img. So, I just wanted to let you know about it.

Again, thanks for great paper.