Fix bugs in equipment allocation using hotkeys

The behaviour is still not perfect, should be able to cycle through all
options by pressing one key. There is unnecessary memory of past state
going on here

src/Dodge/Inventory/CheckSlots.hs

@@ -1,13 +1,12 @@
 module Dodge.Inventory.CheckSlots (
     checkInvSlotsYou,
     crNumFreeSlots,
-    crInvSize,
 ) where
 
+import Control.Monad
 import Dodge.Item.InvSize
 import Control.Lens
 import Data.Monoid
-import Dodge.Base.You
 import Dodge.Data.World
 import qualified IntMapHelp as IM
 
@@ -15,19 +14,13 @@ import qualified IntMapHelp as IM
  if so return Just the next slot to be used
 -}
 checkInvSlotsYou :: Item -> World -> Maybe Int
-checkInvSlotsYou it w
-    | crNumFreeSlots ycr >= itInvHeight it =
-        Just . IM.newKey $ _crInv ycr
-    | otherwise = Nothing
-  where
-    ycr = you w
+checkInvSlotsYou it w = do
+    ycr <- w ^? cWorld . lWorld . creatures . ix 0
+    guard $ crNumFreeSlots ycr >= itInvHeight it
+    Just . IM.newKey $ _crInv ycr
 
 crNumFreeSlots :: Creature -> Int
 crNumFreeSlots cr = _crInvCapacity cr - invSize (_crInv cr)
 
-crInvSize :: Creature -> Int
-crInvSize = invSize . _crInv
-
 invSize :: IM.IntMap Item -> Int
 invSize = alaf Sum foldMap itInvHeight
---invSize = sum . fmap _itInvSize