Rescale Bug Fix

Hi,

I consider this a bug.
I had the following situation: There was an image that was 61x59 px and I made a version preset with a size of 60x30 px. It did not rescale the image, even though I expecet it to do so. When I changed the version size to 64x32 px, it did rescale the image.
This is my suggestion to fix it.