Fix T98459: vertex weight paste/copy inconsistent

In the editmode sidebar, pasting a particular vertex's weight in a
single group was not behaving the same as copying for all groups [in
that the former dis not copy to unassigned vertices whereas the later
did copy to unassigned vertices].

This behaves like this since the introduction in {rB70fd2320c8d2}, but
there does not seem to be a good reason for this?

Now make this consistent and use `BKE_defvert_copy_index` in both cases
(instead of earlying out if unassigned, this will make sure this will
also copy to unassigned).

Maniphest Tasks: T98459

Differential Revision: https://developer.blender.org/D15062

0 files changed, 0 insertions, 0 deletions