Signature: Work on a default-constructed object instead of NULL.
Signature: Work on a default-constructed object instead of NULL.

Change-Id: I4cf51d5b468a9c52a5dd0dbf1c76018490bac49a
Reviewed-on: http://gerrit.aldebaran.lan:8080/3927
Reviewed-by: cgestes <ddb78fe00abb42f91254c16a0860e38eb0781789@aldebaran-robotics.com>
Tested-by: cgestes <ddb78fe00abb42f91254c16a0860e38eb0781789@aldebaran-robotics.com>

aldebaran/libqi,aldebaran/libqi-java,aldebaran/libqi-java,bsautron/libqi,aldebaran/libqi-java,aldebaran/libqi,aldebaran/libqi,vbarbaresi/libqi