* m4/getcwd-path-max.m4 (gl_FUNC_GETCWD_PATH_MAX): Don't bother to try to remove a parent directory if the child couldn't be removed (except for the first rmdir, which could fail because the child doesn't exist). Problem reported by Jeff Blaine in <http://lists.gnu.org/archive/html/bug-tar/2007-03/msg00014.html>.