Build Fix -- Remove some duplicate symbol defs to appease ld.
I think recent ld is a lot less forgiving of multiple defintions of
things. I needed this change to fix my build.
* src/media/sound.c: Qdevice is defined in general-slots.h, don't
redefine it here.
* src/media/media.c: Qimage, Qtype, Qwidth, Qheight, Qunknown all
defined in general-slots.h, don't redefine here
* src/ent/ent-int.c: Qzero is defined in symbols.c, don't redefine
it here.
* src/ui/glyphs.c: Don't define Qdata or Qfile here as it's
defined in general-slots.h
Signed-off-by: Steve Youngs <steve@sxemacs.org>