Blender Git Loki

Fix incorrect mesh selection duplication in internal utility function

`BKE_mesh_new_nomain_from_template_ex()` would duplicate the mesh selection
storage of the destination mesh to the destination mesh. Since that mesh was
default initialized at this point, the selection was `NULL`, so the duplication
call is essentially a no-op.

Mistake in 7efc75c7092b.

Differential Revision: https://developer.blender.org/D10009

Reviewed by: Sybren St�vel