netfilter: nf_tables: Eliminate duplicated code in nf_tables_table_enable()

If something fails in nf_tables_table_enable(), it unregisters the
chains. But the rollback code is the same as nf_tables_table_disable()
almostly, except there is one counter check.  Now create one wrapper
function to eliminate the duplicated codes.

Signed-off-by: Feng <fgao@ikuai8.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

path: root/.travis.yml

language: c
compiler:
  - gcc
  - clang
sudo: false

addons:
  apt:
    packages:
    - libnl-3-dev
    - libnl-genl-3-dev
    - libnl-route-3-dev
    - libnetfilter-conntrack-dev
    - libgeoip-dev
    - liburcu-dev
    - libpcap-dev
    - libnet1-dev
    - libcli-dev

script: CC=$CC ./configure && make CC=$CC