85ffb71e44
Caused by e5ec04d73c
Since above commit, the edge crease is a named attribute and considered
a "fake" customdata layer (similar to bevel weights or UV seams --
`CD_FAKE`). Thus, a special case in
`data_transfer_layersmapping_generate` has to be added for
`CD_FAKE_CREASE`.
Pull Request: https://projects.blender.org/blender/blender/pulls/115180