Error message

• Warning: Missing argument 1 for locations_callback() in locations_callback() (line 179 of /srv/www/data/drupal/sites/all/modules/loom_saargummi_views/loom_saargummi_views.module).
• Notice: Undefined variable: continent in locations_callback() (line 184 of /srv/www/data/drupal/sites/all/modules/loom_saargummi_views/loom_saargummi_views.module).