ae: fix problem uncovered by alpine build

src/process_pipeline.c

@@ -381,7 +381,7 @@ static void
 update_control(controlstate *control)
 {
 	clamp_control(control);
-	mp_io_pipeline_set_control_int32(control, control->value_req);
+	mp_io_pipeline_set_control_int32(&control->control, control->value_req);
 	control->value = control->value_req;
 }