iptables: don't use --enable-ipv6 if IPv6 is disabled

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@36125 3c298f89-4303-0410-b956-a3cf2f4a3e73

package/network/utils/iptables/Makefile

@@ -10,7 +10,7 @@ include $(INCLUDE_DIR)/kernel.mk
 
 PKG_NAME:=iptables
 PKG_VERSION:=1.4.18
-PKG_RELEASE:=2
+PKG_RELEASE:=3
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.bz2
 PKG_SOURCE_URL:=http://www.netfilter.org/projects/iptables/files \
@@ -347,7 +347,6 @@ TARGET_CFLAGS += \
 CONFIGURE_ARGS += \
 	--enable-shared \
 	--enable-devel \
-	$(if $(CONFIG_IPV6),--enable-ipv6,--disable-ipv6) \
 	--with-kernel="$(LINUX_DIR)/user_headers" \
 	--with-xtlibdir=/usr/lib/iptables \
 	--enable-static