patch 8.0.1460: missing file in patch

Problem:    Missing file in patch.
Solution:   Add changes to missing file.
diff --git a/src/misc2.c b/src/misc2.c
index 66aeee0..f089051 100644
--- a/src/misc2.c
+++ b/src/misc2.c
@@ -3389,13 +3389,20 @@
  * Return OK or FAIL.
  */
     int
-vim_chdirfile(char_u *fname)
+vim_chdirfile(char_u *fname, char *trigger_autocmd UNUSED)
 {
     char_u	dir[MAXPATHL];
+    int		res;
 
     vim_strncpy(dir, fname, MAXPATHL - 1);
     *gettail_sep(dir) = NUL;
-    return mch_chdir((char *)dir) == 0 ? OK : FAIL;
+    res = mch_chdir((char *)dir) == 0 ? OK : FAIL;
+#ifdef FEAT_AUTOCMD
+    if (res == OK && trigger_autocmd != NULL)
+	apply_autocmds(EVENT_DIRCHANGED, (char_u *)trigger_autocmd,
+							   dir, FALSE, curbuf);
+#endif
+    return res;
 }
 #endif