Fix warning comparaison between int and unsigned long
Fix warning comparaison between int and unsigned long

Change-Id: I672c01aab103f9235262c56df2b91f34b2152867
Reviewed-on: http://gerrit.aldebaran.lan/53466
Reviewed-by: jlamotte <70353e7b0c7d18b7fc75605daf0ccba69fcd3222@aldebaran.com>
Approved: hcuche <2a0975cc082cedff4d4350e3f6ec187146151bc6@aldebaran-robotics.com>
Reviewed-by: hcuche <2a0975cc082cedff4d4350e3f6ec187146151bc6@aldebaran-robotics.com>
Tested-by: hcuche <2a0975cc082cedff4d4350e3f6ec187146151bc6@aldebaran-robotics.com>

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