MoMMI keeper speaking fixes.
Created by: ComicIronic
Moved snowflake code into handle_inherent_channels. Damn you, snowflake code. MoMMIs now speak on Damage Control only if they have Keeper = 1. Otherwise, they speak normally. We no longer loop through world whenever an MoMMI speaks. Could be adapted to a more general Damage Control system, but otherwise works fine for now. Fixes #2578 (closed).