Ticket #10440: is_active_sidebar_names.diff

--- wp-includes/widgets-2.8.1.php       2009-07-10 15:12:26.000000000 +0200
+++ wp-includes/widgets.php     2009-07-18 16:08:56.000000000 +0200
@@ -933,9 +933,20 @@
  * @param mixed $index, sidebar name, id or number to check.
  * @return bool true if the sidebar is in use, false otherwise.
  */
 function is_active_sidebar( $index ) {
-       $index = ( is_int($index) ) ? "sidebar-$index" : sanitize_title($index);
+  global $wp_registered_sidebars;
+       if ( is_int($index) ) {
+               $index = "sidebar-$index";
+       } else {
+               $index = sanitize_title($index);
+               foreach ( (array) $wp_registered_sidebars as $key => $value ) {
+                       if ( sanitize_title($value['name']) == $index ) {
+                               $index = $key;
+                               break;
+                       }
+               }
+       }
        $sidebars_widgets = wp_get_sidebars_widgets();
        if ( isset($sidebars_widgets[$index]) && !empty($sidebars_widgets[$index]) )
                return true;