Return default value for hit index and hit side instead of throwing

[JustinHuPrime]

Fixes #847

Instead of throwing, we should return a reasonable default value - in this case, use the direction hit as the face hit and not deal with the overlay. (Additionally, we should consider only querying the overlay for wrench hits instead of all hits.)

[JustinHuPrime]

This fix should be okay to back-port if needed - the relevant code hasn't been changed recently

[Technici4n]

Thanks!