`to_pil_image` rounds down

Describe the bug

The current code is: pic = pic.mul(255).byte().

If the input is, say, 0.9999, this will be rounded down to 254 instead of 255.

>>> torch.as_tensor([0.9999]).mul(255).byte().item()
254

I would suggest that the code be: pic = pic.mul(255).round().byte():

>>> torch.as_tensor([0.9999]).mul(255).round().byte().item()
255

Versions

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