[STATS] ZZ'rot damage against towers isn't counted in End of Game stats

The damage dealt by ZZ'rot Portal Voidlings to towers isn't credited to the item's owner in the End of Game stats screen, despite being correctly displayed in the in-game item tooltip.

You can check this game: http://matchhistory.euw.leagueoflegends.com/en/#match-details/EUW1/3387424044/215346755?tab=stats I'm credited with only 2.3K damage to towers as Singed, while the in-game ZZ'rot tooltip was well above 5K just by itself.

The bug should also be dead-easy to reproduce by yourself. Just launch a Custom game, buy a ZZ'rot, let it hit towers a few times and check the End of Game Stats.