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.
(XFree86 Bugzilla #1438, John Heasley). "To fix this, I've added a
mouse buffer (Xisb buffer) "scale" value to the MouseDevPtr type. If
set, it is used as structure size of which we want space for a few."