partial-completion-mode and deleting symlink problem

[Dan Nicolaescu]

partial-completion-mode seems to cause a problem when one tries to
delete a symlink to a non-existent file. 

Try this:

ln -s BLAHBLAHBLAH /tmp/DELETEME 
(this assumes that neither BLAHBLAHBLAH nor /tmp/DELETEME exist before
running ln).

emacs -q
M-x partial-completion-mode RET
M-x delete-file RET /tmp/DELETEME RET

instead of deleting /tmp/DELETEME the minibuffer shows:
Delete file: /tmp/DELETEME [Confirm]
Pressing RET does not do anything... 

If the symlink target for /tmp/DELETEME exists, then /tmp/DELETEME is
deleted just fine...