This bit of ff-squad-control code is trying to sort guards based on
their distance from some shared target. In some cases the
`vector-vector-distance` returns NaN. In the bubble sort below this
change, the < operation always returns #t when NaN is involved, so the
NaN guard gets swapped back and forth endlessly, causing an infinite
loop.
- `vector-h`
- `gravity-h`
- `bounding-box-h`
- `matrix-h`
- `quaternion-h`
- `euler-h`
- `transform-h`
- `geometry-h`
- `trigonometry-h`
- `transformq-h`
- `bounding-box`
- `matrix`
- `matrix-compose`
- `transform`
- `quaternion`
- `euler`
- `trigonometry`
Not a whole lot of changes, just a couple of new functions and one new
file (`matrix-compose`).
water111