Decouple Gormlak AI from creatures

Decouple the definition of the Gormlak AI from the creature type itself
using generic lenses and a "HasVisionRadius" typeclass, to begin to
untangle the hs-boot web of circular dependencies. This
actually *increases* the number of hs-boot files from 1 to 2, but both
of the source imports that use them are single-instance (unlike gormlak
AI which I would expect to grow linearly with the growth of the game),
plus at least one should be able to go away once we remove collision
from the game lenses module and move it into something defined in the
entity class itself.

1 files changed, 3 insertions, 3 deletions

diff --git a/src/Xanthous/Game/Lenses.hs b/src/Xanthous/Game/Lenses.hs
index 4a080f85f0..580435a068 100644
--- a/src/Xanthous/Game/Lenses.hs
+++ b/src/Xanthous/Game/Lenses.hs
@@ -27,9 +27,9 @@ import qualified Xanthous.Data.EntityMap as EntityMap
 import           Xanthous.Data.EntityMap.Graphics (visiblePositions)
 import           Xanthous.Entities.Character (Character, mkCharacter)
 import           Xanthous.Entities.Environment (Door, open, GroundMessage)
-import           Xanthous.Entities.Item (Item)
-import           Xanthous.Entities.Creature (Creature)
-import           Xanthous.Entities.Entities ()
+import            Xanthous.Entities.Item (Item)
+import           {-# SOURCE #-} Xanthous.Entities.Creature (Creature)
+import           {-# SOURCE #-} Xanthous.Entities.Entities ()
 --------------------------------------------------------------------------------
 
 getInitialState :: IO GameState