Index: node_type_filter.module
===================================================================
RCS file: /cvs/drupal-contrib/contributions/modules/node_type_filter/node_type_filter.module,v
retrieving revision 1.2
diff -u -r1.2 node_type_filter.module
--- node_type_filter.module	9 Mar 2005 13:01:34 -0000	1.2
+++ node_type_filter.module	13 Jul 2006 16:49:50 -0000
@@ -20,7 +20,7 @@
  */ 
   function node_type_filter_db_rewrite_sql($query, $primary_table, $primary_field, $args) {
     if ($primary_field == 'nid') {
-      if ($str_types = $_REQUEST['type']) {
+      if (isset($_REQUEST['type']) && ($str_types = $_REQUEST['type'])) {
         $types = explode(',', $str_types);
         foreach ($types as $type) {
           $ctypes[] = db_escape_string($type);