Fix unused variable warning
Fix unused variable warning

Change-Id: Ie0ae4402bca078f45d78a5fd952d2d55795014af
Reviewed-on: http://gerrit.aldebaran.lan:8080/14531
Reviewed-by: llec <42f1a1c02cacc0f5b0188f0127ea77bedfdcf21a@aldebaran-robotics.com>
Tested-by: llec <42f1a1c02cacc0f5b0188f0127ea77bedfdcf21a@aldebaran-robotics.com>

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