Uncaught SyntaxError: Unexpected token , in Google map when lat / long is null

[bobbingwide]

Detected on anchorgolf.com the generated JavaScript produces the Uncaught SyntaxError in the following line generated to display a Google Map.

var latlng = new google.maps.LatLng(,);

Workaround

Enter values for the lat and long.

[bobbingwide]

The problem is associated with the "googlemap" virtual field in oik-fields.
Function bw_fields_get_google_map() in includes\oik-fields-virtual-google-map.php
which calls bw_googlemap_v3() directly.

$google_map = bw_googlemap_v3( get_the_title( $ID )   
 , $lat
 , $long
 , $post_code
 , "100%"
 , "400px"
 );

The simple solution would be to not call the function if either $lat or $long was null.

[bobbingwide]

It's possible to produce the same problem by setting lat and long to blanks.
It's also possible to create a different error by setting the fields to non-numeric values.
e.g.

Uncaught ReferenceError: x is not defined
    at initialize0 

So, it would make sense to perform some validation of the lat and long values when setting the combined $latlng field.

[bobbingwide]

Having changed the logic to use a function called bw_gmap_latlng() I've subsequently discovered that the bw_gmap_markers() function doesn't handle markers where the latitude and longitude are defined using the lat:lng method and the value of lat is an integer.
This test will pass for $marker set to "30:30"

      if ( $marker == absint( $marker ) ) {

Also note that the maximum latitude supportey by GoogleMaps is 85 degrees.
See https://stackoverflow.com/questions/11849636/maximum-lat-and-long-bounds-for-the-world-google-maps-api-latlngbounds