Blender Git Loki

Fixed black dot bug! (it does work for the test case I had)
But I still wonder about its correction because it looks the
oposite of whats documented and of what was used before :S

I also took a long time to find it because I tought blender was feeding the raytrace structure
with quads and triangles but it looks the quads get triangulated before reaching makeraytree (on rayshade.c).