ffmpeg source update for sep 09

source/patched-ffmpeg-mt/libavformat/vorbiscomment.c

 /*
  * VorbisComment writer
  * Copyright (c) 2009 James Darnley
  *
  * This file is part of FFmpeg.
  *
  * FFmpeg is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
@@ skipping 25 matching lines @@
 };
 
 int ff_vorbiscomment_length(AVMetadata *m, const char *vendor_string,
                             unsigned *count)
 {
     int len = 8;
     len += strlen(vendor_string);
     *count = 0;
     if (m) {
         AVMetadataTag *tag = NULL;
-        while ( (tag = av_metadata_get(m, "", tag, AV_METADATA_IGNORE_SUFFIX) ) ) {
+        while ((tag = av_metadata_get(m, "", tag, AV_METADATA_IGNORE_SUFFIX))) {
             len += 4 +strlen(tag->key) + 1 + strlen(tag->value);
             (*count)++;
         }
     }
     return len;
 }
 
 int ff_vorbiscomment_write(uint8_t **p, AVMetadata *m,
                            const char *vendor_string, const unsigned count)
 {
     bytestream_put_le32(p, strlen(vendor_string));
     bytestream_put_buffer(p, vendor_string, strlen(vendor_string));
     if (m) {
         AVMetadataTag *tag = NULL;
         bytestream_put_le32(p, count);
-        while ( (tag = av_metadata_get(m, "", tag, AV_METADATA_IGNORE_SUFFIX) ) ) {
+        while ((tag = av_metadata_get(m, "", tag, AV_METADATA_IGNORE_SUFFIX))) {
             unsigned int len1 = strlen(tag->key);
             unsigned int len2 = strlen(tag->value);
             bytestream_put_le32(p, len1+1+len2);
             bytestream_put_buffer(p, tag->key, len1);
             bytestream_put_byte(p, '=');
             bytestream_put_buffer(p, tag->value, len2);
         }
     } else
         bytestream_put_le32(p, 0);
     return 0;
 }