vim-patch:9.0.1362: ml_get error when going to another tab (#22443)

Problem:    ml_get error when going to another tab. (Daniel J. Perry)
Solution:   Do not call update_topline() if "curwin" is invalid.
            (closes vim/vim#11907)

99ad3a8bb9

Co-authored-by: Bram Moolenaar <Bram@vim.org>

src/nvim/window.c

@@ -4813,7 +4813,7 @@ static void win_enter_ext(win_T *const wp, const int flags)
 
   // Might need to scroll the old window before switching, e.g., when the
   // cursor was moved.
-  if (*p_spk == 'c') {
+  if (*p_spk == 'c' && !curwin_invalid) {
     update_topline(curwin);
   }