* gdk/win32/makefile.{cygwin,msc}: Copy our gdkprivate.h and
gdkx.h to a gdk subdirectory, so that applications can include
these with <gdk/*.h> without trouble.
* gdk/win32/gdkimage.c (gdk_image_new_with_depth): Code simplified.
(gdk_image_destroy): Plugged resource leak, some GdkImages didn't
have their bitmap destroyed.
* gdk/win32/gdk.def: Add gdk_root_parent.
directory hierarchy like this, with common gdk.h and gdktypes.h
for all backends. gdkrectangles.c and gdkrgb.c is copied before
compilation from the x11 backed (which still is in .., but
eventually will be in ..\x11).