Multivalue field addition doesn't trigger geocode

Here is my scenario:

I have an entity with a multivalue addressfield and a geofield that geocodes addresses from that field. Adding another address to an existing address field does not trigger a geocode on the field.

In geocoder_widget_get_field_value() the call to geocoder_widget_array_recursive_diff() seems to have the parameters in the wrong order:

if (!empty($field_original) && !empty($target_original)) {
  $diff = geocoder_widget_array_recursive_diff($field_original, $source_field_values);
  if (empty($diff)) {
    return FALSE;
  }
}

Since geocoder_widget_array_recursive_diff() works like PHP's array_diff() in that it returns the elements in array1 that are not in array2, it seems like this snippet will return FALSE even if $source_field_values (the new values) has a new item.

The attached patch reverses the parameters.