Fix linting error
Fix linting error

RyanCavanaugh/TypeScript,kpreisser/TypeScript,nojvek/TypeScript,donaldpipowitch/TypeScript,SaschaNaz/TypeScript,Microsoft/TypeScript,nojvek/TypeScript,basarat/TypeScript,minestarks/TypeScript,Microsoft/TypeScript,alexeagle/TypeScript,weswigham/TypeScript,Microsoft/TypeScript,kitsonk/TypeScript,minestarks/TypeScript,donaldpipowitch/TypeScript,alexeagle/TypeScript,kpreisser/TypeScript,minestarks/TypeScript,microsoft/TypeScript,nojvek/TypeScript,SaschaNaz/TypeScript,donaldpipowitch/TypeScript,microsoft/TypeScript,donaldpipowitch/TypeScript,microsoft/TypeScript,basarat/TypeScript,kpreisser/TypeScript,RyanCavanaugh/TypeScript,nojvek/TypeScript,basarat/TypeScript,alexeagle/TypeScript,kitsonk/TypeScript,RyanCavanaugh/TypeScript,basarat/TypeScript,SaschaNaz/TypeScript,kitsonk/TypeScript,weswigham/TypeScript,weswigham/TypeScript,SaschaNaz/TypeScript