Clear session pointer on release, even if it doesn't get dealloc'd.
Clear session pointer on release, even if it doesn't get dealloc'd.

Ryezhang/stronglink,yamingd/stronglink,Lacra17/stronglink,Ryezhang/stronglink,nkatsaros/stronglink,rmoorman/stronglink,iOSCowboy/stronglink,btrask/stronglink,yamingd/stronglink,guiquanz/stronglink,rmoorman/stronglink,feld/stronglink,nkatsaros/stronglink,Ryezhang/stronglink,guiquanz/stronglink,guiquanz/stronglink,nkatsaros/stronglink,feld/stronglink,Lacra17/stronglink,yamingd/stronglink,shaunstanislaus/stronglink,feld/stronglink,shaunstanislaus/stronglink,btrask/stronglink,btrask/stronglink,rmoorman/stronglink,btrask/stronglink,shaunstanislaus/stronglink,iOSCowboy/stronglink,iOSCowboy/stronglink,Lacra17/stronglink