saltstack/salt — pull request #9271 by itnihao (2013-12-15 09:42:29+00:00)
Title: fix return null iptables.append

return null in iptables.append,fix it
```
salt 'node1' iptables.append filter INPUT rule='-s 0.0.0.0 -p tcp --dport 80 -j ACCEPT'
node1:
True
salt 'node1' iptables.append filter INPUT rule='-s 0.0.0.0 -p tcp --dport 80 -j ACCEPT4'
node1:
False
```