[pLog-general] render function in adminview

[Su Baochen]

hi oscar,

I think in class adminview.clsss.php, parent::render() should be called
at the beginning of function render, because, menurender will output
something to client, so if we set header information in parent::render,
will cause broswer to display some messages like "headers have been
send..." and etc.

In one word, first call parent::render will avoid this kind of anony
messages.

Su Baochen