bug#6147: 23.2; ido-read-buffer regression

[Stefan Monnier]

> In the version of ido shipped with 23.2, the behaviour of the
> ido-make-buffer-list function no longer permits a default value to be
> used by ido-read-buffer unless that value is the name of a preexisting
> buffer.

> This can be reproduced by evaluating:

> (ido-read-buffer "Buffer: " "nonexistent-buffer")

> In 23.2, you will see only a list of your current buffers. In 23.1,
> nonexistent-buffer is the default value.

I believe this bug in now fixed in the emacs-23 branch, thanks to the
reversal of the patch that changed this behavior (replaced by
a different one which happens not to make this change).


        Stefan