Mario Kart - Super Circuit: track renders incorrectly

[angelo-wf]

The track in Mario Kart - Super Circuit seems to render incorrectly, with a strange rightward curve.

Here is a screenshot, showing the right side of the track curving to the right and the tree growing on the track itself.

As a comparison, here is a screenshot from mGBA showing the track's right side being straight and the tree to the right of it in the grass. The sprites are in identical spots, so it seems the rendering of the background layer is at fault.

This was using the web version (in Safari), with a BIOS loaded.

[skylersaleh]

I have a fix I am pushing to #40 for this.