[committed, fortran] Fix invoke.texi entry

[Thomas Koenig]

On Sun, 2007-09-02 at 21:09 -0700, Steve Kargl wrote:

Hi Steve,

> 2007-09-02  Steven G. Kargl  <kargl@gcc.gnu.org>
> 
>         * invoke.texi: Fix the -frange-checking option entry.

Tested with "make dvi", "make pdf" and "make info".  OK.

	Thomas