bug#10534: 23.3; wrong max size in windows

[phoenix]

1.Drag the windows task bar from bottom to right.
2.Double click the 
Emacs title bar to max it.
3.Click the Emacs task button on windows task bar 
to minimize the Emacs window.
4.Reclick the Emacs task button on windows task 
bar to max it.
5.The Emacs widdow's right boder has been go in to the windows 
task bar. It should be close to the windows task bar.