avformat/nutenc: cleaner version check

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavformat/nutenc.c

@@ -698,7 +698,7 @@ static int nut_write_header(AVFormatContext *s)
     nut->avf = s;
 
     nut->version = FFMAX(NUT_STABLE_VERSION, 3 + !!nut->flags);
-    if (nut->flags && s->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
+    if (nut->version > 3 && s->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
         av_log(s, AV_LOG_ERROR,
                "The additional syncpoint modes require version %d, "
                "that is currently not finalized, "