Fixed #5645: realloc return handling
unsigned lodepng_decode_file(unsigned char** out, unsigned* w, unsigned* h, const char* filename,
                             LodePNGColorType colortype, unsigned bitdepth)
{
  unsigned char* buffer;
  size_t buffersize;
  unsigned error;
  error = lodepng_load_file(&buffer, &buffersize, filename);
  if(!error) error = lodepng_decode_memory(out, w, h, buffer, buffersize, colortype, bitdepth);
  free(buffer);
  return error;
}

unsigned lodepng_decode_file(unsigned char** out, unsigned* w, unsigned* h, const char* filename,
                             LodePNGColorType colortype, unsigned bitdepth)
{
  unsigned char* buffer;
  size_t buffersize;
  unsigned error;
  error = lodepng_load_file(&buffer, &buffersize, filename);
  if(!error) error = lodepng_decode_memory(out, w, h, buffer, buffersize, colortype, bitdepth);
  free(buffer);
  return error;
}
