fix missing variable declaration
fix missing variable declaration

shilu89757/react-mixin,trusktr/react-mixin,trusktr/react-mixin,STRML/react-mixin,shilu89757/react-mixin,brigand/react-mixin,dallonf/react-mixin,dallonf/react-mixin,trusktr/react-mixin,shilu89757/react-mixin,brigand/react-mixin,STRML/react-mixin,brigand/react-mixin,STRML/react-mixin,dallonf/react-mixin