Muffle libGL error message when run under ssh (bnc#890189)

This changes:
  commit 22ad1610e9a4e72367524dad85eff75873a57b21
  Author: Werner Fink <werner@suse.de>
  Date:   Mon Jul 21 14:04:26 2014 +0200

    Avoid libGL error via ssh (bnc#869172)

    Signed-off-by: Werner Fink <werner@suse.de>

The change just avoids the error message, it doesn't prevent
libGL from attempting direct rendering. This way we don't rule
out direct rendering under ssh entirely as there are scenarios
where it will be usable.

Signed-off-by: Egbert Eich <eich@suse.de>