Question about the division operation with Fourier time embedding

[zdhNarsil]

Why there is a sample = sample / timesteps line in UNet forward?
(See https://github.com/huggingface/diffusers/blob/main/src/diffusers/models/unets/unet_2d.py#L341)

In my opinion, here timesteps is in [0, 1], and thus could be 0; so there could be inf issue due to "divided by 0".