[PATCH 1/7] Redirect grep's stderr top null too.

[Darren Tucker <dtucker@xxxxxxxxxxx>]

Prevents pollution of configure output on platforms that don't have
grep -a.

Signed-off-by: Darren Tucker <dtucker@xxxxxxxxxxx>
---
 configure.ac | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index 66aedb9288..4effc82b76 100644
--- a/configure.ac
+++ b/configure.ac
@@ -526,7 +526,7 @@ if test -n "$ASCIIDOC"; then
 	esac
 fi
 
-if grep -a ascii configure.ac >/dev/null; then
+if grep -a ascii configure.ac >/dev/null 2>&1; then
   AC_MSG_RESULT([Using 'grep -a' for sane_grep])
   SANE_TEXT_GREP=-a
 else
-- 
2.21.3