[Python][Build] Fix compile error in case hpp-fcl is not used.
[Python][Build] Fix compile error in case hpp-fcl is not used.

fvalenza/pinocchio,fvalenza/pinocchio,aelkhour/pinocchio,aelkhour/pinocchio,fvalenza/pinocchio,fvalenza/pinocchio,aelkhour/pinocchio,aelkhour/pinocchio