If clauses in get_posts query

by

only retrieve posts with that meta key:

$rand_posts = get_posts(array( 
  'numberposts' => 4, 
  'orderby' => 'rand', 
  'post_type' => 'ansatte', 
  'order' => 'ASC',
  'meta_key' => 'employee_pic',
 ));

or maybe use WP 3.1’s meta_query:

$rand_posts = get_posts(array( 
  'numberposts' => 4, 
  'orderby' => 'rand', 
  'post_type' => 'ansatte', 
  'order' => 'ASC',
  'meta_query' => array(
     array(
      'key'     => 'employee_pic',
      'value'   => '',
      'compare' => 'NOT LIKE'
     ),
   )
 ));