Autozoom Fix: GMap Views Plugin needs Additional Latitude/Longitude Validation for Adding Markers

As per #457822: Latitude and Longitude set to 180, 360, sometimes Location data needs additional latitude/longitude validation, beyond just checking that it is not empty. I added this validation to the Location module's location_has_coordinates() function, but that function is not currently being leveraged by gmap_plugin_style_gmap->render().

My current fix is to change the foreach() loop that renders the markers as follows:

if ((!empty($lat) && !empty($lon))
		 && ($lat != 0 && $lon != 0)
		 && ($lat != 180 && $lon != 360)) {

(That comes in around line 99 of gmap_plugin_style_gmap.inc.)

Once I have added this code, all the problems I previously experienced with GMap centering have disappearing. It would be great if someone can test this code to see whether it resolves issues for them.

Let me know if you need me to roll a proper patch. I'm swamped with work right now, but I may get around to it soon.