[wwwdocs] Entry for PR 18160 in changes.html

[Gerald Pfeifer]

On Fri, 12 Nov 2004, Adam Nemet wrote:
> The patch below adds two entries for the changed behavior implemented
> under PR 18160.  The entries are under `C and Objective-C' and `C++'.
> It passes the XHTML 1.0 Validator.
>
> Is it OK to install?

> Index: changes.html
> ===================================================================
> +     <li>Taking the address of a variable with <code>register</code>
> +         storage is invalid in C.  GCC now issues an error instead of a
> +         warning.</li>

This part is fine, thanks!

> +     <li>Taking the address of an explicit register variable is no
> + 	longer supported.  Note that C++ allows taking the address of
> + 	variables with <code>register</code> storage so this will
> + 	continue to compile with a warning.</li>

This I had to read a couple of times until I remembered the details of
the discussion on this list -- providing a short example would be useful,
for the notion of "explicit register variable" is not immediate.

Something like "...of an explicit register variable (as in ...)..."
perhaps?

Gerald