Index: includes/admin.inc
===================================================================
RCS file: /cvs/drupal-contrib/contributions/modules/views/includes/admin.inc,v
retrieving revision 1.154
diff -u -p -r1.154 admin.inc
--- includes/admin.inc	7 Apr 2009 20:48:28 -0000	1.154
+++ includes/admin.inc	23 Aug 2009 13:55:58 -0000
@@ -2893,7 +2893,7 @@ function views_fetch_fields($base, $type
           continue;
         }
         foreach (array('field', 'sort', 'filter', 'argument', 'relationship') as $key) {
-          if (!empty($info[$key])) {
+          if (is_array($info[$key])) {
             if (!empty($info[$key]['skip base'])) {
               foreach ((array) $info[$key]['skip base'] as $base_name) {
                 $skip_bases[$field][$key][$base_name] = TRUE;