static SVG_SAFExternalStream *svg_saf_get_stream(GF_SVG_Parser *parser, u32 id, const char *name)
{
	SVG_SAFExternalStream *st;
	st = parser->streams;
	while (st) {
		if (id == st->id) return st;
		if (name && st->stream_name && !strcmp(name, st->stream_name) ) return st;
		st = st->next;
	}
	return NULL;
}
static SVG_SAFExternalStream *svg_saf_get_stream(GF_SVG_Parser *parser, u32 id, const char *name)
{
	SVG_SAFExternalStream *st;
	st = parser->streams;
	while (st) {
		if (id == st->id) return st;
		if (name && st->stream_name && !strcmp(name, st->stream_name) ) return st;
		st = st->next;
	}
	return NULL;
}