Swift 3 beta 6: added explicit casting
Swift 3 beta 6: added explicit casting

victorlin/ReactiveCocoa,ohwutup/ReactiveCocoa,ReactiveCocoa/ReactiveSwift,calebd/ReactiveCocoa,walkingsmarts/ReactiveCocoa,sandyway/ReactiveCocoa,walkingsmarts/ReactiveCocoa,ohwutup/ReactiveCocoa,ikesyo/ReactiveCocoa,ReactiveCocoa/ReactiveSwift,ikesyo/ReactiveCocoa,calebd/ReactiveCocoa,walkingsmarts/ReactiveCocoa,calebd/ReactiveCocoa,ohwutup/ReactiveCocoa,sandyway/ReactiveCocoa,victorlin/ReactiveCocoa,ReactiveCocoa/ReactiveSwift,victorlin/ReactiveCocoa,sandyway/ReactiveCocoa