AdjustWindowRectEx2 renamed to SafeAdjustWindowRectEx. Don't override all

AdjustWindowRectEx2 renamed to SafeAdjustWindowRectEx. Don't override all

	* gdk/win32/gdkwindow.c: AdjustWindowRectEx2 renamed to
 	SafeAdjustWindowRectEx. Don't override all calls to
 	AdjustWindowRectEx by it, but use it only in two places: When
 	creating a new top-level window and when moving a top-level
 	window.

	Use screen coordinate rectangle, not client rectangle, in
 	gdk_window_move. Thus SafeAdjustWindowRectEx will do its job only
 	when we try to place a window so that the decoration (mainly,
 	title bar) isn't visible.

	These changes fix the bug that showed up for instance as the
 	GIMP's saved top-level windows moving right and down (by an amount
 	equal to the window decoration) for each session. This bug showed
 	up also in testgtk's "Saved Position".

	gdk_window_resize also redone a bit.