build: fix ./configure with non-bash shell

 CONFIG_SHELL=/bin/dash ./configure

breaks with:

 ./config.status: 2044: Syntax error: Bad for loop variable

Fixes: 64c07e38f049 ("table: Embed creating nft version into userdata")
Signed-off-by: Jan Palus <jpalus@fastmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

diff --git a/configure.ac b/configure.ac
index 6825474b70611a0d8ab00c6a236e34c66dcc012e..dd172e88ca581d8da25396559ed2e1cb8229d217 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -157,7 +157,7 @@ AC_CONFIG_COMMANDS([nftversion.h], [
        echo "  ${STABLE_RELEASE}"
        echo "};"
        echo "static char nftbuildstamp[[]] = {"
-       for ((i = 56; i >= 0; i-= 8)); do
+       for i in `seq 56 -8 0`; do
                echo "  ((uint64_t)MAKE_STAMP >> $i) & 0xff,"
        done
        echo "};"