SDL and optional keywords

[Pupeno]

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I managed to get it working, this is the pidgin message to draw a line:
SDL drawLineFromX: 0 y: 0 toX: 100 y: 100 red: 255 gren: 255 blue: 255. SDL 
updateScreen.
It works. :D
I'm now trying to create a slate founction that would be more friendly, so, 
I've done this:
s@(SDL traits) drawLineFrom: from@(Point traits) to: to@(Point traits) 
&withColor: color
[
 color ifNil: [ color: (Color r: 255 g: 255 b: 255). ].
 SDL traits drawLineFromX: from x y: from y toX: to x y: to y red: color red 
gren: color green blue: color blue.
].

It worked untill I tried to make withColor an optional keyword. Now it says:
Slate 11> SDL drawLineFrom: 0 , 10 to: 200, 200.
Fatal signal: Segmentation Fault (SDL Parachute Deployed)

Any ideas ?

Thanks
- -- 
Pupeno: pupeno at pupeno.com - http://www.pupeno.com
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