2007-01-11  Ralf Wildenhues  <Ralf.Wildenhues@gmx.de>

	* lib/autoconf/programs.m4 (AC_PROG_SED): When closing a pipe
	early on the reader side, drop stderr of the input to avoid
	`broken pipe' error output; this may happen even with shell
	builtin `echo' of some bash versions.  Reports by Ian Macdonald
	<iamacdo@telkomsa.net> and Sam Sexton <Sam.Sexton@reuters.com>.

Index: lib/autoconf/programs.m4
===================================================================
RCS file: /sources/autoconf/autoconf/lib/autoconf/programs.m4,v
retrieving revision 1.63
retrieving revision 1.64
diff -u -a -p -u -p -a -r1.63 -r1.64
--- lib/autoconf/programs.m4	17 Nov 2006 21:04:54 -0000	1.63
+++ lib/autoconf/programs.m4	11 Jan 2007 21:17:37 -0000	1.64
@@ -859,7 +859,7 @@ AC_DEFUN([AC_PROG_SED],
      for ac_i in 1 2 3 4 5 6 7; do
        ac_script="$ac_script$as_nl$ac_script"
      done
-     echo "$ac_script" | sed 99q >conftest.sed
+     echo "$ac_script" 2>/dev/null | sed 99q >conftest.sed
      $as_unset ac_script || ac_script=
      _AC_PATH_PROG_FEATURE_CHECK(SED, [sed gsed],
 	[_AC_FEATURE_CHECK_LENGTH([ac_path_SED], [ac_cv_path_SED],