bug#12081: 24.1; buffer-predicate often not called

[martin rudalics]

> 1. Evaluate:
>
> (set-frame-parameter
>    (selected-frame)
>    'buffer-predicate (lambda (b) (message "buffer predicate: %s" b)))
>
> 2. `C-x C-f /tmp/xx RET'
>
> 3. `C-x C-f /tmp/yy RET'
>
> 4. `C-x k RET'
>
> 5. `M-: (message "======")'
>
> 6. `C-x b *Messages* RET'
>
> This shows that the buffer-predicate never called when deciding what
> buffer to replace yy with.

Not so here: *Messages* contains the three lines fragment below

=====
"====="
buffer predicate: *scratch*

martin