DiscTerrainCollision and DiscTerrainCollision4pt were both reporting that there was no contact if the center of the disc was more than the disc radius away from the ground directly underneath that center. When the wheel is in a banked turn, it will still be touching the ground even if the ground underneath the center is a bit more than the radius away, so this check was removed and the methods simply continue with their calculations below. Also, some minor typos in the related comments were fixed.
DiscTerrainCollision and DiscTerrainCollision4pt were both reporting that there was no contact if the center of the disc was more than the disc radius away from the ground directly underneath that center. When the wheel is in a banked turn, it will still be touching the ground even if the ground underneath the center is a bit more than the radius away, so this check was removed and the methods simply continue with their calculations below. Also, some minor typos in the related comments were fixed.

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