stream: close rtwritefd

rtreadfd is added as IO in the context loop, and closed when that loop
is torn down. But rtwritefd is only used by the stream, and needs to
be closed when the stream is destroyed.

Change-Id: I7cdd623290933b2aff861003fdf1f390ff566a49

pipewire/client/stream.c

@@ -327,6 +327,8 @@ void pw_stream_destroy(struct pw_stream *stream)
 	if (stream->name)
 		free(stream->name);
 
+	close(impl->rtwritefd);
+
 	free(impl);
 }