change object flipping

src/core/Global.ttslua

@@ -225,11 +225,7 @@ function onObjectEnterZone(zone, object)
   elseif zone.type == "Hand" and object.type == "Card" then
     -- make sure the card is face-up
     if object.is_face_down then
-      if object.held_by_color then
-        object.held_flip_index = 0
-      else
-        object.flip()
-      end
+      object.flip()
     end
 
     -- maybe reset data about sealed tokens (if that function exists)