message: vertexcodec: Fix builds with TRACE > 0
diff: @@ -345,7 +345,7 @@ static unsigned char* encodeBytes(unsigned char* data, const unsigned char* buff
  memset(header, 0, header_size);
  #if TRACE > 0
  - encodeVertexBlockStats.current_headers += header_end - header;
  + encodeVertexBlockStats.current_headers += header_size;
  #endif
  for (size_t i = 0; i < buffer_size; i += kByteGroupSize)
  @@ -375,7 +375,7 @@ static unsigned char* encodeBytes(unsigned char* data, const unsigned char* buff
  }
  #if TRACE > 0
  - encodeVertexBlockStats.current_content += data - header_end;
  + encodeVertexBlockStats.current_content += data - header - header_size;
  #endif
  return data;
  