lavf/flvenc: Cosmetics: fix indentation

fix indentation

Signed-off-by: Jun Zhao <barryjzhao@tencent.com>

libavformat/flvenc.c

@@ -970,10 +970,10 @@ static int flv_write_packet(AVFormatContext *s, AVPacket *pkt)
     } else if (par->codec_id == AV_CODEC_ID_AAC && pkt->size > 2 &&
                (AV_RB16(pkt->data) & 0xfff0) == 0xfff0) {
         if (!s->streams[pkt->stream_index]->nb_frames) {
-        av_log(s, AV_LOG_ERROR, "Malformed AAC bitstream detected: "
+            av_log(s, AV_LOG_ERROR, "Malformed AAC bitstream detected: "
-               "use the audio bitstream filter 'aac_adtstoasc' to fix it "
+                   "use the audio bitstream filter 'aac_adtstoasc' to fix it "
-               "('-bsf:a aac_adtstoasc' option with ffmpeg)\n");
+                   "('-bsf:a aac_adtstoasc' option with ffmpeg)\n");
-        return AVERROR_INVALIDDATA;
+            return AVERROR_INVALIDDATA;
         }
         av_log(s, AV_LOG_WARNING, "aac bitstream error\n");
     }