update location for 4.7.4

Based on Heine's list, Location will no longer work in 4.7.4.

I believe the offending forms are

location.module:
function theme_location_search
function theme_location_map_link_options
function theme_location_geocoding_options

A simple form_render($form) on the end should fix it.

For information on fixing: http://drupal.org/node/89999

This would also be a problem for CVS, but it's more critical for 4.7.0