"First" filter fails with expressions

Given this data:

``` javascript
$scope.types = [
{
"name": "type1",
"default": false
},
{
"name": "type2",
"default": true
}
];
```

This failed:
`

`

I had to revert to:
`

`

As a test I also did:
`

`
but didn't seem to work either

This was working on 0.4.5 but not in 0.5.2

The issue is about the 'first' filter failing with expressions. Look at the filter implementation in the source code, likely in a file like 'first.js' or 'firstFilter.js'. Test the filter with the provided examples to reproduce the regression from version 0.4.5 to 0.5.2. Check the commit history around that version for changes to the filter logic. Ensure the fix allows expressions like 'default === true' and numeric arguments to work correctly.

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