Comment 3 for bug 165363

It actually is worse than just being messed up while
scaling. create a rect, whose width is smaller than it's
height. You are able to move the "roundness"-node until the
curves meet on the long side. This leaves you with an elipse
and not a rect with rounded corners. What should happen, is
that you can't move the "roundness"-node any further than
until the curves meet on the _shorter_ side not the _left_
side, no matter if the rectangle is landscape or portrait.