Fix the order of width and height of original size in SDXL training script

[linjiapro]

What does this PR do?

Original size of image will be passed into SDXL pipeline. The order of it should be width, height according to StableDiffusionXLPipeline, but the training script has it in the order of height, width. This PR fixes that.

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[linjiapro]

cc @siriuscdk

[sayakpaul]

Thanks very much!

Could you maybe propagate this change to the other scripts as well?

Thanks very much in advance :-)

[linjiapro]

@sayakpaul
I have found another file needs edit, already get it done.

What will be the next step? Do I click "Update branch" button to get it merged into the branch?

[sayakpaul]

Thanks for your help. Once the CI is green, I am happy to merge it.

[gtebbutt]

I've been chasing down an issue in my own training code and came across this commit - I wanted to double check if there might be an error here, since as far as I can see the pipeline code and original paper both use (h, w) ordering?

[patrickvonplaten]

I've been chasing down an issue in my own training code and came across this commit - I wanted to double check if there might be an error here, since as far as I can see the pipeline code and original paper both use (h, w) ordering?

You're 100% correct! We need to be more careful here going forward and always double-check (cc @sayakpaul )