fix hotspot build failures with -D_FORTIFY_SOURCE=2 and -Wformat=1

[Christian Thalinger]

On Tue, 2008-12-02 at 18:12 +0100, Matthias Klose wrote:
> --- openjdk/hotspot/src/share/vm/prims/jvm.cpp~ 2008-11-20
> 09:41:05.000000000 +0100
> +++ openjdk/hotspot/src/share/vm/prims/jvm.cpp  2008-12-02
> 16:55:32.000000000 +0100
> @@ -2474,7 +2474,7 @@
>    if (Arguments::vfprintf_hook() != NULL) {
>      jio_fprintf(defaultStream::output_stream(), "%s", s);
>    } else {
> -    ::write(defaultStream::output_fd(), s, (int)strlen(s));
> +    ssize_t rv = ::write(defaultStream::output_fd(), s,
> (int)strlen(s));
>    }
>  }

David and Kelly already answered what I wanted to say, but as I still
have this compose window open since yesterday... :-)

I would also prefer the void cast here as it would be much clearer for
the unexperienced reader.

- Christian