Index: includes/common.inc
===================================================================
RCS file: /cvs/drupal/drupal/includes/common.inc,v
retrieving revision 1.756.2.89
diff -u -p -r1.756.2.89 common.inc
--- includes/common.inc	2 Jun 2010 18:58:25 -0000	1.756.2.89
+++ includes/common.inc	16 Jun 2010 03:59:32 -0000
@@ -3319,9 +3319,10 @@ function drupal_get_schema_unprocessed($
   if (!is_null($table) && isset($schema[$table])) {
     return $schema[$table];
   }
-  else {
+  else if (!empty($schema)) {
     return $schema;
   }
+  return array();
 }
 
 /**