dmxAddExtensions takes an argument to determine if it should just
initialize the DMX extension, or both DMX & GLX, but if GLX wasn't
compiled in, the entire call was #ifdef'ed out, leaving the DMX
extension unavailable.
Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Reviewed-by: Julien Cristau <jcristau@debian.org>
Signed-off-by: Keith Packard <keithp@keithp.com>