ObjectHost: Fix a double-delete.
ObjectHost: Fix a double-delete.

Change-Id: Ic06edc301323484ba0a777b9fd8da6753d0a5e1f
Reviewed-on: http://gerrit.aldebaran.lan/25238
Reviewed-by: cgestes <ddb78fe00abb42f91254c16a0860e38eb0781789@aldebaran-robotics.com>
Reviewed-by: mnottale <e3ccf1b6558404e921a21fa09cebb1153b50ec36@aldebaran-robotics.com>
Tested-by: mnottale <e3ccf1b6558404e921a21fa09cebb1153b50ec36@aldebaran-robotics.com>

aldebaran/libqi,bsautron/libqi,aldebaran/libqi,vbarbaresi/libqi,aldebaran/libqi