worksap-ate/aws-sdk — pull request #167 by amutake (2013-12-10 10:47:34+00:00)
Title: Fix type error of EC2Tests.NetworkInterfaceAttributeTests

Fix following compilation error.

```
test/EC2Tests/NetworkInterfaceAttributeTests.hs:78:74:
Couldn't match type `Maybe Text' with `Text'
Expected type: Group -> Text
Actual type: Group -> Maybe Text
In the first argument of `map', namely `groupId'
In the second argument of `modifyNetworkInterfaceSecurityGroup', namely
`(map groupId sgs)'
In a stmt of a 'do' block:
modifyNetworkInterfaceSecurityGroup nic (map groupId sgs)
```