Image editors: After cropping, request new sizes from the image. If we rely on...

Image editors: After cropping, request new sizes from the image. If we rely on the values passed in, they may be floats. We must see what the image results in.

Cast in update_size() for sanity.

props DH-Shredder.
fixes #22779.



git-svn-id: https://core.svn.wordpress.org/trunk@23103 1a063a9b-81f0-0310-95a4-ce76da25c4cd