Check for undefined-ness instead of NaN-ness
Check for undefined-ness instead of NaN-ness

`getDistanceAndClosestModel` no longer returns NaN for missing values
*Technically* `isNaN(undefined) === true` but that would be a horror hack.

keithiopia/spotlight,tijmenb/spotlight,tijmenb/spotlight,keithiopia/spotlight,keithiopia/spotlight,tijmenb/spotlight,alphagov/spotlight,alphagov/spotlight,alphagov/spotlight