bug#30285: dired-do-chmod vs. top line of dired

[積丹尼 Dan Jacobson]

M runs the command dired-do-chmod.
If used on the very top line of dired
(the directory name,) it says:
"Change mode of * [0 files] to: "
which doesn't make a lot of sense.
emacs-version "25.2.2"

Same problem if used on the second line, (total...).

(Why doesn't it just complain "can't operate on" like it does for the
third line, ".".)