gst/tcp/gstmultifdsink.c: If caps change, then update the client's idea of the caps so that we don't end up re-sendin...

Original commit message from CVS:
* gst/tcp/gstmultifdsink.c:
(gst_multi_fd_sink_client_queue_buffer):
If caps change, then update the client's idea of the caps so that we
don't end up re-sending streamheaders for every single buffer after
the caps change.