Question on GSDrawingFunctions

[Fred Kiefer]

I just wanted to use the new GSDrawingFunction to allow NSButtonCell to 
draw in a configurable way, but than I did spot a few differences there. 
First NSButtonCell currently uses NSDrawGrayBezel, whereas 
GSDrawingFunctions only implements DrawDarkBezel. Now I did myself 
change NSDrawDarkBezel to call NSDrawGrayBezel, but am still unsure if 
this is actually correct. Could somebody with an OpenStep or Cocoa 
machine please test the difference between these two?

There is also a small difference in the implementation of 
NSDrawGrayBezel and DrawDarkBezel. The second round of lines are drawn 
in a different order. This only is visible on very close inspection, 
still I wonder which way is correct and if we should change them to be 
the same. Again input from somebody with a reference impementation would 
be welcome.