The map does not render

leaflet_googlemaps.js is loaded before drupal_leaflet.js so Drupal.leaflet is undefided causing an error. The solution is altering the rendering order of the js library script tag. In leaflet_googlemaps.module change line 96 to this one:

drupal_add_js(drupal_get_path('module', 'leaflet_googlemaps') . '/leaflet_googlemaps.js', array('weight' => 10));