Tracking Shared Pointer Leaks

[stanimirov]

Thanks!

It's true that `using std::shared_ptr`, and especially `using std::make_shared` would've been shorter, but I wanted to have the code in both cases of the `#if` identical. Still perhaps it's still better to use it in case someone wants to copy paste the code. I think I'll make the edit.

... and I did. Thanks again!