No realms update on node operations

When i'm trying to update some nodes private status from content management (/admin/content/node) only {private} table in database is updated but not the 'realm' column in {node_access}. So, the result is non working as expected...
A small patch (just a copy of some lines of code from node_access_rebuild() function) is down here - i think it can be done in a cleaner way...

--- private.module.orig       2010-07-01 00:03:01.000000000 +0400
+++ private.module      2010-07-01 00:09:30.000000000 +0400
@@ -304,6 +304,12 @@
     if (!db_affected_rows()) {
       db_query('INSERT INTO {private} (nid, private) VALUES (%d, %d)', $nid, 1);
     }
+    $loaded_node = node_load($nid);
+    // To preserve database integrity, only aquire grants if the node
+    // loads successfully.
+    if (!empty($loaded_node)) {
+      node_access_acquire_grants($loaded_node);
+    }
   }
 }

@@ -316,6 +322,12 @@
     if (!db_affected_rows()) {
       db_query('INSERT INTO {private} (nid, private) VALUES (%d, %d)', $nid, 0);
     }
+    $loaded_node = node_load($nid);
+    // To preserve database integrity, only aquire grants if the node
+    // loads successfully.
+    if (!empty($loaded_node)) {
+      node_access_acquire_grants($loaded_node);
+    }
   }
 }