patch 9.1.0272: autocmd may change cwd after :tcd and :lcd

Problem:  Autocommand may change currect directory after :tcd and :lcd.
Solution: Also clear tp_localdir and w_localdir when using aucmd_win.
          (zeertzjq)

closes: #14435

Signed-off-by: zeertzjq <zeertzjq@outlook.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/window.c b/src/window.c
index 9ffca77..7d78b5f 100644
--- a/src/window.c
+++ b/src/window.c
@@ -4437,8 +4437,7 @@
     ++buf->b_nwindows;
     win_init_empty(wp); // set cursor and topline to safe values
 
-    // Make sure w_localdir and globaldir are NULL to avoid a chdir() in
-    // win_enter_ext().
+    // Make sure w_localdir is NULL to avoid a chdir() in win_enter_ext().
     VIM_CLEAR(wp->w_localdir);
 }
 
@@ -5445,8 +5444,8 @@
  * Used after making another window the current one: change directory if
  * needed.
  */
-    static void
-fix_current_dir(void)
+    void
+win_fix_current_dir(void)
 {
     if (curwin->w_localdir != NULL || curtab->tp_localdir != NULL)
     {
@@ -5567,7 +5566,7 @@
     }
 #endif
 
-    fix_current_dir();
+    win_fix_current_dir();
 
 #ifdef FEAT_JOB_CHANNEL
     entering_window(curwin);