Bounding box clipping doesn't work right with New Zealand parcels

You can select Chatham Island from Natural Earth with

```
➤ tippecanoe -zg -f -o foo.mbtiles --clip-bounding-box=-178.327,-45.644,-173.854,-42.663 ne_10m_admin_0_countries.json
```

but

```
➤ tippecanoe -zg -f -o foo.mbtiles --clip-bounding-box=-178.327,-45.644,-173.854,-42.663 --drop-densest-as-needed ../Downloads/nz_primary_parcels.json.gz
```

does not select its parcels.

Reproduce the issue with the two tippecanoe commands and the Natural Earth and nz_primary_parcels.json.gz inputs shown above. Compare the clipping results for the Chatham Island bounding box; done means the New Zealand parcel command selects the parcels in that box as the Natural Earth command does.

Written by the indexing model from the issue text.