rem: if ((size_t) link_length < buf_size)
add: if (link_length < buf_size)
context: xreadlink (char const *filename){  /* The initial buffer size for the link value.  A power of 2     detects arithmetic overflow earlier, but is not required.  */  size_t buf_size = 128;  while (1)    {      char *buffer = xmalloc (buf_size);      ssize_t link_length = readlink (filename, buffer, buf_size);      if (link_length < 0)	{	  int saved_errno = errno;	  free (buffer);	  errno = saved_errno;	  return NULL;	}      if ((size_t) link_length < buf_size)	{	  buffer[link_length] = 0;	  return buffer;	}      free (buffer);      buf_size *= 2;      if (SSIZE_MAX < buf_size || (SIZE_MAX / 2 < SSIZE_MAX && buf_size == 0))	xalloc_die ();    }}