Index: includes/common.inc
===================================================================
RCS file: /cvs/drupal/drupal/includes/common.inc,v
retrieving revision 1.756.2.97
diff -u -p -r1.756.2.97 common.inc
--- includes/common.inc	11 Aug 2010 21:10:41 -0000	1.756.2.97
+++ includes/common.inc	22 Aug 2010 00:55:44 -0000
@@ -3370,9 +3370,11 @@ function drupal_get_schema_unprocessed($
   if (!is_null($table) && isset($schema[$table])) {
     return $schema[$table];
   }
-  else {
+  elseif (!empty($schema)) {
     return $schema;
   }
+
+  return array();
 }
 
 /**