Remove a bodge to avoid collision between X header and the native
Win32 API definitions of ATOM, use X11/Xwindows.h which exists to
address these issues
Consequently, include misc.h in winclipboardthread.c, to provide the
max() macro, as previously we were using the the one from windows.h
Signed-off-by: Jon TURNEY <jon.turney@dronecode.org.uk>
change "foo.h" to <X11/foo.h> for core headers, e.g. X.h, Xpoll.h;
change "foo.h", "extensions/foo.h" and "X11/foo.h" to
<X11/extensions/foo.h> for extension headers, e.g. Xv.h;
change "foo.[ch]" to <X11/Xtrans/foo.[ch]> for Xtrans files.
