[Client] Able to buy skins without owning the champion.

As the title says, it was possible to buy a skin for a champion that I do not own.

Here is my current list of owned champions, note that Lissandra is not one of them.

Here is Lissandra's entry in the store; again, I do not own her.

However, Blade Queen Lissandra is available to purchase in the store.

I attempted to buy Blade Queen Lissandra and the purchase went through as normal. Unfortunately, I forgot to take a screen-shot of these steps.

Here is my champion list again, and Lissandra is still not owned.

And here is the skin page for Blade Queen Lissandra post purchase, noting that I do indeed own the skin.