make CBase58Data class use zero_after_free_allocator
make CBase58Data class use zero_after_free_allocator

- this way there is no need for an explicit destructor, who does the same
  thing anyway

CoinGame/NuShadowNet,CoinGame/BCEShadow,CoinGame/NuShadowNet,CoinGame/BCEShadowNet,CoinGame/BCEShadowNet,CoinGame/NuShadowNet,CoinGame/BCEShadow,CoinGame/BCEShadow,CoinGame/NuShadowNet,CoinGame/BCEShadowNet,CoinGame/BCEShadow,CoinGame/BCEShadow,CoinGame/BCEShadowNet,CoinGame/NuShadowNet,CoinGame/BCEShadowNet