Update ViewController.mm

*****Receive Selector Error*****
[VCSimpleSession initWithVideoSize:frameRate:bitrate:useInterfaceOrientation:]: unrecognized selector sent to instance 0x98896e0
2014-08-02 15:24:47.358 SampleBroadcaster[3611:60b] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[VCSimpleSession initWithVideoSize:frameRate:bitrate:useInterfaceOrientation:]: unrecognized selector sent to instance 0x98896e0'