Libxo bugs and fixes.

[Simon J. Gerraty]

Alfred Perlstein <bright at mu.org> wrote:
> Yes, the patch leaves it to the caller. The otherwise when you run "netstat --libxo json 1" you only see output every BUFSIZE bytes from netstat. 

I was refering to the call to xo_flush in xo_emit.
The application best knows what are suitable points at which to flush
its output.
If you eliminate that call, it might be ok