Edited Issue: activity log error when starting interactive window [994]

vs 2013, ntvs dev 2014-05-16

```
System.NullReferenceException: Object reference not set to an instance of an object. at
Microsoft.NodejsTools.Extensions.GetAnalyzer(ITextBuffer buffer) at
Microsoft.NodejsTools.Extensions.GetAnalyzer(ITextView textView) at
Microsoft.NodejsTools.Intellisense.IntellisenseControllerProvider.TryCreateIntellisenseController(ITextView textView, IList`1 subjectBuffers) at
Microsoft.VisualStudio.Language.Intellisense.Implementation.IntellisenseManagerConnectionListener.<>c__DisplayClass5.<SubjectBuffersConnected>b__1(IIntellisenseControllerProvider provider) at
Microsoft.VisualStudio.Text.Utilities.GuardedOperations.InstantiateExtension[TExtension,TMetadata,TExtensionInstance](Object errorSource, Lazy`2 provider, Func`2 getter)

```