Add a filter to wp_terms_checklist() that wraps the function's arguments.

Mainly designed to allow checked_ontop to be turned off.

props husobj.
fixes #20054.



git-svn-id: https://develop.svn.wordpress.org/trunk@20710 602fd350-edb4-49c9-b593-d223f7449a82

wp-admin/includes/template.php

@@ -96,6 +96,8 @@ function wp_terms_checklist($post_id = 0, $args = array()) {
 		'taxonomy' => 'category',
 		'checked_ontop' => true
 	);
+	$args = apply_filters( 'wp_terms_checklist_args', $args, $post_id );
+
 	extract( wp_parse_args($args, $defaults), EXTR_SKIP );
 
 	if ( empty($walker) || !is_a($walker, 'Walker') )