Index: openacs-4/packages/categories/www/cadmin/category-usage.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/categories/www/cadmin/category-usage.tcl,v
diff -u -r1.6.12.1 -r1.6.12.2
--- openacs-4/packages/categories/www/cadmin/category-usage.tcl	29 Jul 2014 11:14:18 -0000	1.6.12.1
+++ openacs-4/packages/categories/www/cadmin/category-usage.tcl	5 Aug 2014 13:23:45 -0000	1.6.12.2
@@ -5,8 +5,8 @@
     @author Timo Hentschel (timo@timohentschel.de)
     @cvs-id $Id:
 } {
-    category_id:integer
-    tree_id:integer
+    category_id:naturalnum,notnull
+    tree_id:naturalnum,notnull
     {locale ""}
     object_id:naturalnum,optional
     {page:integer,optional 1}