29c0b34b20
Linked data should only be duplicated if relevant `eDupli_ID_Flags` flag is set (`USER_DUP_LINKED_ID`), this is being taken care of by generic `BKE_id_copy_for_duplicate` function, but for some reasons (?) `BKE_object_duplicate` was directly using `BKE_id_copy` for itself... Note that this had especially bad consequences when duplicating overrides of collections...