Fixes cirular references detection in PhantomReporter.js.

The logic which was in place to convert array-like objects to arrays
prevented the circular reference detection to work properly for arrays
and array-like objects.
Merge branch 'phantomreporter' of https://github.com/fkling/grunt-contrib-jasmine

* 'phantomreporter' of https://github.com/fkling/grunt-contrib-jasmine:
  Fixes cirular references detection in PhantomReporter.js.