Fixed slotMax function caching up dirtied player data.
Fixed many portals not supposed to warp players to "random spawnpoints".
Fixed Wind Walk not being cancellable by attacking.
Implemented Guild PQ. Fixed a problem introduced earlier where negative
EXP would be deemed as "integer overflow", provoking many game breaking
issues as result.
Made NPCs now work properly on multiworld system. Solved multiple issues
regarding Player Shops not giving back items properly when owner exits.
Added restriction on changing channels at FM rooms, preventing shop
owner entering Cash Shop.