add condition to import a pose from Alembic file #157
add condition to import a pose from Alembic file #157

If the rotation matrix is the identity and the translation vector is
full of zeros, it's because there is no corresponding pose and during
Alembic export this default pose has been created.

poparteu/openMVG,poparteu/openMVG,poparteu/openMVG,poparteu/openMVG