client: fix an issue not clearing userlist on exit

client/dcwebui.js

@@ -230,7 +230,7 @@ var userlist = {
 			var userlist = userlists[i];
 			
 			var users = userlist.children;
-			for (var j = 0; j < users.length; j++) {
+			for (var j = users.length; j --> 0;) {
 				userlist.removeChild(users[j]);
 			}
 		}