- fixed: Fog didn't work with Line_Horizon
- fixed: Using ExtraFloor_LightOnly in a skybox with non-black fog caused rendering
- fixed: Apparently it is possible that AActor::Tick is called after the 3D floor data has been deleted.
- fixed: The desaturation shader must first desaturate and then light. It did it in reverse order.
- fixed: gl_billboard_mode used an incorrect default value.
git-svn-id: http://mancubus.net/svn/hosted/gzdoom/trunk@17 b0f79afe-0144-0410-b225-9a4edf0717df
