- fixed coordinate order in renderSetViewpoint - fixed backwall checks accidentally testing wall 0 instead of the current wall.
Most cases should be correct now.
y-panning is still not correct for all cases but better than before. The aspect factor is not needed, it looks like an artifact of both the software renderer and Polymost. We get the same dimensions with proper matrices by setting this to 1.
It renders walls, but y-panning is still broken.
