Index: includes/database/database.inc
===================================================================
RCS file: /cvs/drupal/drupal/includes/database/database.inc,v
retrieving revision 1.87
diff -u -r1.87 database.inc
--- includes/database/database.inc	15 Dec 2009 08:30:53 -0000	1.87
+++ includes/database/database.inc	3 Jan 2010 07:11:01 -0000
@@ -2693,4 +2693,7 @@
     include_once DRUPAL_ROOT . '/includes/install.inc';
     install_goto('install.php');
   }
+  elseif (empty($databases)) {
+    $databases = array();
+  }
 }