test_value: fix warnings
test_value: fix warnings

Change-Id: I0eecf80187f151f00935eedb2cb04ce110ed394c
Reviewed-on: http://gerrit.aldebaran.lan:8080/15122
Reviewed-by: cgestes <ddb78fe00abb42f91254c16a0860e38eb0781789@aldebaran-robotics.com>
Tested-by: cgestes <ddb78fe00abb42f91254c16a0860e38eb0781789@aldebaran-robotics.com>

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