Filter features with large buffer are in the wrong place on the earth

```
tippecanoe -z3 --no-tile-size-limit --no-feature-limit --no-simplification --no-tiny-polygon-reduction -b127 -c 'mkdir -p output/$1/$2; cat > output/$1/$2/$3.ldgeojson' /Users/enf/Downloads/RhodeIsland.ldgeojson -f -e output
```

The coordinates in `output/0/0/0.ldgeojson` are like `[ 108.281250, 41.836828 ]` instead of like `[-71.822269,41.368928]`. Overflow in the longitude somewhere? Doesn't happen without the large buffer of `-b127`.

Run the provided tippecanoe command with -b127 and compare its output coordinates in output/0/0/0.ldgeojson with a run using a smaller buffer. Trace the coordinate handling involved in large-buffer tile generation and verify that the output remains near the source Rhode Island coordinates without the longitude shift.

Written by the indexing model from the issue text.