Similar to T60623 / rB2894e75121d7. Issue (when parenting with 'Follow Curve') is that the curves CU_FOLLOW flag is set on the original, but not the evaluated curve (yet), leading to misbehaviour in 'ob_parcurve()'. Setting this on both now. Reviewers: sergey Maniphest Tasks: T62601 Differential Revision: https://developer.blender.org/D4524