[wwwdocs] Wconversion changes in 4.3

["Manuel López-Ibáñez" <lopezibanez at gmail dot com>]

:ADDPATCH wwwdocs:

Document changes to -Wconversion and "new" -Wtraditional-conversion option.

I tried to make it short and to the point so I have skipped examples.
Also, I have avoided to mention differences between C and C++ in
Wconversion behaviour (except for the -Wsign-conversion flag). All
those are explained in the documentation.

OK to commit?

2007-05-19 Manuel Lopez-Ibanez  <manu@gcc.gnu.org>

  * gcc-4.3/changes.html: -Wconversion has changed. New
-Wtraditional-conversion option.

Index: htdocs/gcc-4.3/changes.html
===================================================================
RCS file: /cvs/gcc/wwwdocs/htdocs/gcc-4.3/changes.html,v
retrieving revision 1.52
diff -r1.52 changes.html
39a40,55
> 
>     <li>The <code><a
>     href="http://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html#Warning-Options";
>     >-Wconversion</a></code> option has been modified. Its purpose now
>     is to warn for implicit conversions that may alter a value. This
>     new behavior is available for both C and C++. Warnings about
>     conversions between signed and unsigned integers can be disabled
>     by using <code>-Wno-sign-conversion</code>. In C++, they are
>     disabled by default unless <code>-Wsign-conversion</code> is
>     explicitly requested. The old behavior of
>     <code>-Wconversion</code>, that is, warn for prototypes causing a
>     type conversion that is different from what would happen to the
>     same argument in the absence of a prototype, has been moved to a
>     new option <code>-Wtraditional-conversion</code>, which is only
>     available for C.</li>
>