patch 8.2.4528: crash when using null_function for a partial Commit: https://github.com/vim/vim/commit/673bcb10ebe87ccf6954dd342d0143eb88cdfbcb Author: Bram Moolenaar <Bram@vim.org> Date: Tue Mar 8 16:52:24 2022 +0000 patch 8.2.4528: crash when using null_function for a partial Problem: Crash when using null_function for a partial. Solution: Don't call fname_trans_sid() with NULL. (closes https://github.com/vim/vim/issues/9908)