Fixed a crash caused by unintuitive objc_msgSend behavior on arm64 -
see section Dispatch Objective-C Messages Using the Method Function's Prototype:
https://developer.apple.com/library/ios/documentation/General/Conceptual/CocoaTouch64BitGuide/ConvertingYourAppto64-Bit/ConvertingYourAppto64-Bit.html
Merge pull request #13 from nanonation/tcpendpoint-bugfix

Fixed a crash caused by unintuitive objc_msgSend behavior on arm64