Fix unlikely netconfig handle leak.
Fix unlikely netconfig handle leak.

If no transport types could be found, local_rpcb leaked a
netconfig handle.

Coverity CID 30365.

Signed-off-by: Matt Benjamin <1fa2ef4755a9226cb9a0a4840bd89b158ac71391@linuxbox.com>

sswen/ntirpc,sswen/ntirpc