[6.1] Picture Ingredient: Fix NaN error with free height #2558
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What is this pull request for?
When indicating that a picture can be cropped, but needs to have a certain height or width but leaves the other dimension free, current Alchemy throws a
NaN
error because of float division by Zero.This commit handles this case by returning nil if the calculated mask is Not a Number.
Backport of #2556
Notable changes (remove if none)
None
Screenshots
See #2556
Checklist