missing va_end calls

[Christopher Faylor]

On Tue, Oct 13, 2009 at 06:51:40AM -0600, Eric Blake wrote:
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>As promised:
>
>2009-10-13  Eric Blake  <ebb9@byu.net>
>
>	* external.cc (cygwin_internal): Use va_end.
>	* fork.cc (child_copy): Likewise.
>	* libc/bsdlib.cc (warn, warnx, err, errx): Likewise.
>	* pinfo.cc (commune_request): Likewise.
>	* strace.cc (strace::prntf, strace_printf): Likewise.

For consistency with a lot of other cygwin code please use "res" rather
than "result" in external.cc.

Other than that please check in.

Thanks.

cgf