lispbuilder-sdl-gfx bug: antialiasedfhorizontal lines not drawn by

[stack9...@gmail.com]

I've come across this a few times now...

This draws only 2 sides of a triangle

(draw-polygon '(#(10 10) #(100 100) #(10 100) ) :color *green* :aa t) 

while this draws a triangle 

(draw-polygon '(#(10 10) #(10 100) #(100 100) ) :color *green* :aa t)

The anti-aliased polygon draw seems to have a few other bugs (drawing thicker non-antialiased lines sometimes).  I haven't had a chance to run them down.