BUG/MEDIUM: stream-int: Check if the conn_stream exist in si_cs_io_cb.

It is possible that the conn_stream gets detached from the stream_interface,
and as it subscribed to the wait list, si_cs_io_cb() gets called anyway,
so make sure we have a conn_stream before attempting to send more data.

This is 1.9-specific, no backport is needed.
1 file changed