Python: corrected a bug in data bindings with Eigen members.
Python: corrected a bug in data bindings with Eigen members.

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