Crop-Scaling the same image with different dimensions might produce wrong files
If the same image needs to be generated more than once with different crop-scale configurations, it might occur that the same hash will be generated for both versions, so that the second crop-scaling will render the same image which was produced with the first crop-scaling.
Test with an 800x600 image:
page = PAGE
10 = IMAGE
file = fileadmin/Blaue_Berge.jpg
file.width = 80c
file.height = 80c
wrap = <div>Image 80x80:<br/>|</div>
20 < .10
20.file.width = 100c
20.file.height = 80c
20.wrap = <div>Image 120x80:<br/>|</div>
Expected is two different files (and hashes), but we get the same hash twice (thus the same 80x80 file).
(issue imported from #M6261)