KWin treats a window covering exactly the whole monitor as maximized
when handling its first map request and expects applications to update
maximized state later. Wine doesn't know about this added maximized
state and expect it unchanged, making the window always maximized
as far as KWin is concerned. So always send _NET_WM_STATE updates
even if Wine doesn't expect changes to hint KWin that a window should
not be maximized.

Fix test failures when running the tests introduced by
36b72035 with KWin.
Signed-off-by: Zhiyi Zhang <zzhang@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>