read-directory-name offers files after changing directory

[Wilfred]

M-: (read-directory-name "foo: " "/etc/") RET DEL etc RET M->

This is offering me files:

Note that I'm not offered files when I initially view /etc, but only when leaving and re-entering the directory.

Possibly related: #804

[abo-abo]

Thanks, please test.

[Wilfred]

@abo-abo thanks, works as expected.