Compilation error fixed for iOS.
Compilation error fixed for iOS.

Parrot-Developers/libARNetworkAL,Parrot-Developers/libARNetworkAL,kradhub/libARNetworkAL,niavok/libARNetworkAL,Parrot-Developers/libARNetworkAL,kradhub/libARNetworkAL,kradhub/libARNetworkAL,niavok/libARNetworkAL,Parrot-Developers/libARNetworkAL,niavok/libARNetworkAL