When converting between generic shapes, the roundness type was only
recalculated when the target type was a diamond. Converting a diamond
(which uses the proportional radius algorithm) back to a rectangle kept
the proportional radius, so rectangles ended up rendering with overly
round corners.
---------
Signed-off-by: Mark Tolmacs <mark@lazycat.hu>
Co-authored-by: Maruthan G <maruthang4@gmail.com>
Co-authored-by: Sivram <withsivram@gmail.com>
Co-authored-by: Jai Kumar Dewani <jai.dewani.99@gmail.com>
Co-authored-by: Mark Tolmacs <mark@lazycat.hu>
