xtables-translate: fix multiple spaces issue

This patch fixes a multiple spaces issue. The problem arises when a rule
set loaded through iptables-compat-restore is listed in nft.

Before this commit, two spaces were printed after every match
translation:

$ sudo iptables-save
*filter
:INPUT ACCEPT [0:0]
-A INPUT -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
-A INPUT -p tcp -m multiport --dports 80:85 -m ttl --ttl-gt 5 -j ACCEPT
COMMIT

$ sudo iptables-compat-restore iptables-save

$ sudo nft list ruleset
table ip filter {
    chain INPUT {
        type filter hook input priority 0; policy accept;
        ct state related,established  counter packets 0 bytes 0 accept
                                    ^^
        ip protocol tcp tcp dport 80-85  ip ttl gt 5  counter packets 0 bytes 0 accept
                                       ^^           ^^
    }
}

Signed-off-by: Pablo M. Bermudo Garay <pablombg@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/extensions/libxt_helper.c b/extensions/libxt_helper.c
index a8b7c688..26e95695 100644
--- a/extensions/libxt_helper.c
+++ b/extensions/libxt_helper.c
@@ -50,7 +50,7 @@ static int helper_xlate(const void *ip, const struct xt_entry_match *match,
 {
 	const struct xt_helper_info *info = (const void *)match->data;
 
-	xt_xlate_add(xl, "ct helper%s \\\"%s\\\" ",
+	xt_xlate_add(xl, "ct helper%s \\\"%s\\\"",
 		   info->invert ? " !=" : "", info->name);
 
 	return 1;