Index: wp-admin/includes/template.php
===================================================================
--- wp-admin/includes/template.php	(revision 20604)
+++ wp-admin/includes/template.php	(working copy)
@@ -88,6 +88,7 @@
  * @param array $args
  */
 function wp_terms_checklist($post_id = 0, $args = array()) {
+	$args = apply_filters( 'wp_terms_checklist_args', $args, $post_id );
  	$defaults = array(
 		'descendants_and_self' => 0,
 		'selected_cats' => false,