Fix earthdistance test suite function name typo.

Noah Misch <noah@leadboat.com>

Commit: 003132d178e7a13fbdaf96781d2c43f209b528d0
Author: Noah Misch <noah@leadboat.com>
Date: 2018-07-29T19:02:12Z
Releases: 9.3.24
Fix earthdistance test suite function name typo.

Affected test queries have been testing the wrong thing since their
introduction in commit 4c1383efd132e4f532213c8a8cc63a455f55e344.
Back-patch to 9.3 (all supported versions).

Files