c465d920f4
Regression from commit 68549e00d5 (vcl,
BitmapEx transformed draw: special-case simple rotations, 2019-10-10),
the intention there was to fix an error on the last col/row of a bitmap,
but that was only tested with input where the aspect ratio doesn't
change on scaling.
Fix the problem by going back to the original way in the "aspect ratio
changes" case.
Change-Id: I52bed503ddaadbbbdf64ac6fec2fe268153866f1
Reviewed-on: https://gerrit.libreoffice.org/82467
Tested-by: Jenkins
Reviewed-by: Miklos Vajna <vmiklos@collabora.com>