Move the static values to a defined constant

That way it's not saved and it can be upgraded from version to version

game/scripts/doll/chibi.rpy

@@ -1,3 +1,6 @@
+# will be populated by the chibi inits
+define __poses = {}
+
 init 5 python:
     class DollChibi(renpy.Displayable):
 
@@ -21,7 +24,10 @@ init 5 python:
             if doll is None:
                 doll = states.dolls[name]
             self.char = doll
-            self.poses = poses or {}
+
+            __poses[name] = {}
+            if poses is not None:
+                self.poses.update(poses)
 
             # Animation
             self.anim_frames = None
@@ -42,6 +48,11 @@ init 5 python:
 
             self.instances[name] = self
 
+        # no setter, on purpose
+        @property
+        def poses(self):
+            return __poses[self.name]
+
         def register(self, pose, frames, size):
             self.poses[pose] = (frames, size)