title: show today's closed tickets in Trac wiki using ticketquery
body: <p>I would like to show using Ticketquery all closed tickets for the day only.  I have the following query
  '[[TicketQuery(status=closed,owner=rrwithro|dmorales|hcpatel|pwmitche|adboatne|dbadmin,group=owner,order=priority,format=table,col=id|summary|priority|changetime)]]'</p>
  
  <p>Whenever i put in changetime i get an integer error "".  </p>