Re: Calc window handling

[martin rudalics]

> Something broke in the calc window handling recently, at least in my CVS
> build.  I don't know whether calc, or Emacs's window management is at
> fault.
>
>  emacs -Q
>  M-x calc
>  q
>
>    => The selected buffer is the Calc buffer, as the only window on the
>       frame.  The Calc buffer is supposed to be buried!
>
> Did you change anything in Calc that might have caused this?

Jay didn't do anything.  I recently changed `delete-windows-on' to make
a nil argument default to the current buffer and it seems `calc-quit' is
calling `delete-windows-on' a couple of times with argument nil _not_
meaning the current buffer.  I felt quite sure about my change because
according to the documentation nil was not considered a valid argument
till now for `delete-windows-on' and most other functions in this area
have nil stand for the current buffer.

martin