This is a follow-up on https://github.com/openmaptiles/openmaptiles/pull/1604 . Seminole Nation is shown in the screenshot there with rank 3 while based on area it should be 1. This PR fixes `area_rank()` function to handle areas greater than 160000000, e.g. this fixes #1622 . Co-authored-by: Paul Norman <penorman@mac.com>