Check for null type instead of null keyword
Check for null type instead of null keyword

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