static GF_Err SD_SetSceneGraph(GF_SceneDumper *sdump, GF_SceneGraph *sg)
{
	if (sdump) sdump->sg = sg;
	return GF_OK;
}
static GF_Err SD_SetSceneGraph(GF_SceneDumper *sdump, GF_SceneGraph *sg)
{
	if (sdump) sdump->sg = sg;
	return GF_OK;
}