lavf/sbgdec: use proper constants for av_log().

libavformat/sbgdec.c

@@ -946,7 +946,7 @@ static int expand_tseq(void *log, struct sbg_script *s, int *nb_ev_max,
     struct sbg_script_event *ev;
 
     if (tseq->lock++) {
-        av_log(log, 16, "Recursion loop on \"%.*s\"\n",
+        av_log(log, AV_LOG_ERROR, "Recursion loop on \"%.*s\"\n",
                tseq->name_len, tseq->name);
         return AVERROR(EINVAL);
     }
@@ -957,7 +957,7 @@ static int expand_tseq(void *log, struct sbg_script *s, int *nb_ev_max,
             break;
     }
     if (i >= s->nb_def) {
-        av_log(log, 16, "Tone-set \"%.*s\" not defined\n",
+        av_log(log, AV_LOG_ERROR, "Tone-set \"%.*s\" not defined\n",
                tseq->name_len, tseq->name);
         return AVERROR(EINVAL);
     }