Fix the scheduler status in IE7 - the http readystate needs to be manually reset.

admin/judges_scheduler_status.php

@@ -46,6 +46,7 @@ function updateStatus()
 	document.getElementById('updatestatus').innerHTML="Updating...";
 	var url="judges_scheduler_status_output.php";
 	http.open("GET",url,true);
+	http.readystate=0;
 	http.onreadystatechange=handleResponse;
 	http.send(null);
 }