#83494 by edkwh. Fix the book outline.

modules/book/book.module

@@ -974,7 +974,7 @@ function book_admin_edit_submit($form_id, $form_values) {
  */
 function book_admin($nid = 0) {
   if ($nid) {
-    return book_admin_edit($nid);
+    return drupal_get_form('book_admin_edit', $nid);
   }
   else {
     return book_admin_overview();