Add missing client uname

If an error occurs during the creation of a new hosting client, then the node may created without a "uname" and there will be no entry in the {hosting_client} table for this client node.

If the client node is edited, and an internal name manually entered, then the update is not saved to the database when the node edit is submitted.

This is because the code in function hosting_client_update (file hosting_client.module) can only perform an update on that table (which of course achieves nothing if there is no original record).

The query that does the update should be replaced with the following code:

    if (db_result(db_query('SELECT uname from {hosting_client} WHERE vid=%d', $node->vid))) {
      db_query('UPDATE {hosting_client} SET nid=%d, uname="%s" WHERE vid=%d',
               $node->nid, $node->uname, $node->vid);
    } else {
      db_query('INSERT INTO {hosting_client} (vid, nid, uname) VALUES (%d, %d, "%s")',
               $node->vid, $node->nid, $node->uname);
    }
  }

Of course, the hosting client node should not have this problem, but it can happen, and allowing it to be manually fixed via a simple edit is useful defensive programming.