bug#17375: 24.4.50; minibuffer completion by SPC

[Katsumi Yamaoka]

Hi,

When I visit a hidden buffer (i.e., the name begins with SPC),
now I need to type:

C-x b C-q SPC bla bla...

But IIRC, C-q was not necessary till recently.  Even so, SPC for
the second or later did the completion.  Is there a way to get
the old behavior?

Thanks.

In GNU Emacs 24.4.50.1 (i686-pc-cygwin, GTK+ Version 3.10.7)
 of 2014-04-30 on localhost
Repository revision: 117031 
monnier@iro.umontreal.ca-20140429151607-qnkgbymwfaj5ut08
Windowing system distributor `The Cygwin/X Project', version 11.0.11501000
Configured using:
 `configure --verbose --with-x-toolkit=gtk3'