Fix that ZeroDofJoint::getIndexInTree() was called
Fix that ZeroDofJoint::getIndexInTree() was called

dartsim/dart,dartsim/dart,dartsim/dart,axeisghost/DART6motionBlur,axeisghost/DART6motionBlur,dartsim/dart,dartsim/dart,axeisghost/DART6motionBlur