static void LodePNGUnknownChunks_init(LodePNGInfo* info)
{
  unsigned i;
  for(i = 0; i < 3; i++) info->unknown_chunks_data[i] = 0;
  for(i = 0; i < 3; i++) info->unknown_chunks_size[i] = 0;
}
static void LodePNGUnknownChunks_init(LodePNGInfo* info)
{
  unsigned i;
  for(i = 0; i < 3; i++) info->unknown_chunks_data[i] = 0;
  for(i = 0; i < 3; i++) info->unknown_chunks_size[i] = 0;
}