if you look in the code, you will see:
if (wagmp_map_2_obj.addressFailed) {
map.setCenter(new GLatLng(30, -98), 3);
}
this sets the map to default to palo alto when the address lookup fails.
you could also add an alert to this so show failure:
if (wagmp_map_2_obj.addressFailed) {
alert('lookup of '+address_0.full+' failed');
map.setCenter(new GLatLng(30, -98), 3);
}