rem: { closedir (dirp); return false; }
add: return false;
context: is_empty_dir (char const *dir){  DIR *dirp = opendir (dir);  if (dirp == NULL)    {      closedir (dirp);      return false;    }  while (1)    {      struct dirent *dp;      const char *f;      errno = 0;      dp = readdir (dirp);      if (dp == NULL)	{	  int saved_errno = errno;	  closedir (dirp);	  return saved_errno == 0 ? true : false;	}      f = dp->d_name;      if ( ! DOT_OR_DOTDOT (f))	{	  closedir (dirp);	  return false;	}    }}