configure.ac: send output of check to /dev/null

The output is quite a long line:
kern.cp_times: 10336 0 9848 499639 7613098 18834 0 11963 115 8101970 16444 0 14368 1672 8100398 17584 0 14149 1358 8099791

And we have no use for the result, we just want to know if the sysctl exists.

diff --git a/configure.ac b/configure.ac
index c4483792b016ce3436dd3b58d44394a8c39e4a40..8b150dce01d9ed9410a72a9debb1d7628ddd8b52 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -396,7 +396,7 @@ AC_CHECK_HEADERS(sys/sysctl.h, [], [],
 AC_MSG_CHECKING([for sysctl kern.cp_times])
 if test -x /sbin/sysctl
 then
-       /sbin/sysctl kern.cp_times 2>/dev/null
+       /sbin/sysctl kern.cp_times >/dev/null 2>&1
        if test $? -eq 0
        then
                AC_MSG_RESULT([yes])