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.
height value is used in miFillPolyHelper() to calculate the size of
memory to be allocated. A negative value will lead to a crash (Bugzilla
#2690, Keith Packard, Egbert Eich).