Ranked lobby chat duplicate join message.

Hello,

A very simple fix I assume. It seems that the "<User> joined the room." is sent twice. First is when you join, the next is right after the 'You are now in a chat room with your full champion select team.' message.

Screenshots: http://imgur.com/a/anRdj On OCE Build 6.19.16_09_15_21_03

I assume it's a one-liner.

Nathan