--- tw.install	2009-07-01 12:54:41.000000000 -0400
+++ tw.install	2009-07-01 12:54:51.000000000 -0400
@@ -32,6 +32,7 @@ function tw_schema() {
       'existing_view_data' => array(
         'type' => 'int',
         'size' => 'tiny',
+        'unsigned' => TRUE,
         'not null' => TRUE,
         'default' => (int)FALSE,
       ),