[9fans] rio scaling

[Kernel Panic <cinap_lenrek@gmx.de>]

Hi,

I often use rio-in-rio to group windows. If you draw a new window, rio 
prevents you from
making the window too small to manage (goodrect), but it is possible to 
make windows
smaller by starting a rio-in-rio, create a window in the subrio and 
shrink the parent window,
so the parent scales its children down to a bad size. This results in 
rio to crash in
libframe sometimes:

"draw: frcanfit == 0: screen id in use"

My question is:

Should programs rely on rio making ther windows always a goodrect or 
should it deal with the
case of drawing in a 10x10 or 1x1 image?

I experimented a little bit to find a work arround to this problem. I 
added code to rio
to not making windows smaller than 100 x (3*font->height), but if you 
make rio bigger again
(after shrinking) the window gets too big. So i think about just not to 
scale subwindows at all
to preserve position and size of the subwindows.

Any better ideas?

cinap