[Gameplay] Kalista Rend Bug

Possible Reproduction Steps:

1. Rend right at the moment where you died
2. Use rend on an enemy (minion, champion, etc)
3. The next basic attack will deal additional damage based on rend damage.

Experienced this in my game as Kalista vs a Caitlyn. I rended Caitlyn and we both died at the same time. Afterwards, whenever I used rend, I would deal bonus damage on my next basic attack based on the amount of damage rend did. For example, at the time my rend did 100 damage per stack. My regular basic attack on a minion would deal 145 damage, however, after rending it would deal 245. Note that both instances of damage WILL apply.