Return correct registration port value in Future-based API (#480)
Return correct registration port value in Future-based API (#480)

Summary:
Hi! Most of the HID implementation is still beyond me, but as I work through trying to use it I noticed what looked like a small error made when this code was rewritten to use FBFutures in 21735b26b394d05f9b2da3c5d4f3235450cc5126.
Pull Request resolved: https://github.com/facebook/idb/pull/480

Differential Revision: D15239217

Pulled By: lawrencelomax

fbshipit-source-id: 1cf38746f846310d777002fb8c142db577fc0e3b

facebook/FBSimulatorControl,facebook/FBSimulatorControl,facebook/FBSimulatorControl,facebook/FBSimulatorControl,facebook/FBSimulatorControl