gpgtar: Use FD on POSIX.

* tools/gpgtar.c (main): Fix the use of the union.

--

Fixes-commit: 2756147e39
GnuPG-bug-id: 6562
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>

tools/gpgtar.c

@@ -544,7 +544,7 @@ main (int argc, char **argv)
           syshd.u.handle = hd;
 #else
           syshd.type = ES_SYSHD_FD;
-          syshd.u.handle = fd;
+          syshd.u.fd = fd;
 #endif
           opt.status_stream = es_sysopen (&syshd, "w");
           if (opt.status_stream)