geocoder.reverseGeocode does not accept zeros

[rbeitra]

If you try to do a reverseGeocode on a location on the prime meridian or the equator (lat===0 or lon===0) you get an error because of the input validation here:

geocoder/index.js

Line 71 in 578e795

if ( !lat || !lng ) {

if(undefined !== lat || undefined !== lon){}" would fix this!