bug#7474: In latest source, icomplete-mode makes cursor disappear in minibuffer

[Francis Litterio]

Using Emacs built from the latest source on Windows 7, the cursor
can be made to disappear as follows:

1. Start Emacs with: emacs -Q

2. Type: ESC ESC : (icomplete-mode 1) RET C-h v desc

3. The cursor is no longer visisble in the minibuffer.

4. Type: C-b

5. The cursor is visible over the letter 'c' in "desc".

6. Type: C-f

7. The cursor is once again no longer visible.

This is acting like some of the text in the minibuffer has the
'intangible property, but the word "intangible" doesn't appear anywhere
in lisp/icomplete.el.
--
Fran