remove != 0

Originally committed as revision 13503 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavformat/tiertexseq.c

@@ -68,7 +68,7 @@ static int seq_probe(AVProbeData *p)
     /* there's no real header in a .seq file, the only thing they have in common */
     /* is the first 256 bytes of the file which are always filled with 0 */
     for (i = 0; i < 256; i++)
-        if (p->buf[i] != 0)
+        if (p->buf[i])
             return 0;
 
     if(p->buf[256]==0 && p->buf[257]==0)
@@ -132,7 +132,7 @@ static int seq_parse_frame_data(SeqDemuxContext *seq, ByteIOContext *pb)
 
     /* sound data */
     seq->current_audio_data_offs = get_le16(pb);
-    if (seq->current_audio_data_offs != 0) {
+    if (seq->current_audio_data_offs) {
         seq->current_audio_data_size = SEQ_AUDIO_BUFFER_SIZE * 2;
     } else {
         seq->current_audio_data_size = 0;
@@ -140,7 +140,7 @@ static int seq_parse_frame_data(SeqDemuxContext *seq, ByteIOContext *pb)
 
     /* palette data */
     seq->current_pal_data_offs = get_le16(pb);
-    if (seq->current_pal_data_offs != 0) {
+    if (seq->current_pal_data_offs) {
         seq->current_pal_data_size = 768;
     } else {
         seq->current_pal_data_size = 0;
@@ -154,12 +154,12 @@ static int seq_parse_frame_data(SeqDemuxContext *seq, ByteIOContext *pb)
         offset_table[i] = get_le16(pb);
 
     for (i = 0; i < 3; i++) {
-        if (offset_table[i] != 0) {
+        if (offset_table[i]) {
             for (e = i + 1; e < 3 && offset_table[e] == 0; e++);
             err = seq_fill_buffer(seq, pb, buffer_num[1 + i],
               offset_table[i],
               offset_table[e] - offset_table[i]);
-            if (err != 0)
+            if (err)
                 return err;
         }
     }
@@ -254,13 +254,13 @@ static int seq_read_packet(AVFormatContext *s, AVPacket *pkt)
                 return AVERROR(ENOMEM);
 
             pkt->data[0] = 0;
-            if (seq->current_pal_data_size != 0) {
+            if (seq->current_pal_data_size) {
                 pkt->data[0] |= 1;
                 url_fseek(pb, seq->current_frame_offs + seq->current_pal_data_offs, SEEK_SET);
                 if (get_buffer(pb, &pkt->data[1], seq->current_pal_data_size) != seq->current_pal_data_size)
                     return AVERROR(EIO);
             }
-            if (seq->current_video_data_size != 0) {
+            if (seq->current_video_data_size) {
                 pkt->data[0] |= 2;
                 memcpy(&pkt->data[1 + seq->current_pal_data_size],
                   seq->current_video_data_ptr,