[Linter] Robustness against nil license.
[Linter] Robustness against nil license.

ashfurrow/CocoaPods,vivekshukla-mob-ibtech/Repository,0xced/CocoaPods,segiddins/CocoaPods,mglidden/CocoaPods,mglidden/CocoaPods,mglidden/CocoaPods,orta/CocoaPods,Ashton-W/CocoaPods