[PATCH iptables] configure: Fix logic for flex version check

[Shivani Bhardwaj <shivanib134@gmail.com>]

According to the previous logic of version check for flex, anything
greater than 2.5.33 but within 2.5.x was acceptable. The issue was
observed when a false warning generated for flex version 2.6.0.
New logic works for basically everything greater than 2.5.33.

Signed-off-by: Shivani Bhardwaj <shivanib134@gmail.com>
---
 configure.ac | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index b170add..0040f0b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -164,7 +164,7 @@ if test "x$enable_nftables" = "xyes"; then
 	flex_minor=`echo $flex_version| cut -d . -f 2`
 	flex_rev=`echo $flex_version| cut -d . -f 3`
 
-	if test "$flex_major" -eq "2" && test "$flex_minor" -eq "5" && test "$flex_rev" -ge "33"; then
+	if (test "$flex_major" -eq "2" && test "$flex_minor" -eq "5" && test "$flex_rev" -ge "33") || (test "$flex_major" -eq "2" && test "$flex_minor" -gt "5") || test "$flex_major" -gt "2"; then
 		AC_MSG_RESULT([$flex_version. OK])
 	else
 		AC_MSG_WARN([flex version $flex_version found.
-- 
2.7.4