Use the const version of CustomData::as*

apps/openmw/mwclass/creature.cpp

@@ -734,7 +734,7 @@ namespace MWClass
             return;
         }
 
-        const CreatureCustomData& customData = dynamic_cast<const CreatureCustomData&>(*ptr.getRefData().getCustomData());
+        const CreatureCustomData& customData = ptr.getRefData().getCustomData()->asCreatureCustomData();
 
         customData.mContainerStore->writeState (state2.mInventory);
         customData.mCreatureStats.writeState (state2.mCreatureStats);

apps/openmw/mwclass/creaturelevlist.cpp

@@ -22,6 +22,10 @@ namespace MWClass
         {
             return *this;
         }
+        virtual const CreatureLevListCustomData& asCreatureLevListCustomData() const
+        {
+            return *this;
+        }
     };
 
     MWWorld::CustomData *CreatureLevListCustomData::clone() const
@@ -121,7 +125,7 @@ namespace MWClass
             return;
         }
 
-        const CreatureLevListCustomData& customData = dynamic_cast<const CreatureLevListCustomData&>(*ptr.getRefData().getCustomData());
+        const CreatureLevListCustomData& customData = ptr.getRefData().getCustomData()->asCreatureLevListCustomData();
         state2.mSpawnActorId = customData.mSpawnActorId;
         state2.mSpawn = customData.mSpawn;
     }

apps/openmw/mwclass/door.cpp

@@ -351,7 +351,7 @@ namespace MWClass
             state.mHasCustomState = false;
             return;
         }
-        const DoorCustomData& customData = dynamic_cast<const DoorCustomData&>(*ptr.getRefData().getCustomData());
+        const DoorCustomData& customData = ptr.getRefData().getCustomData()->asDoorCustomData();
 
         ESM::DoorState& state2 = dynamic_cast<ESM::DoorState&>(state);
         state2.mDoorState = customData.mDoorState;

apps/openmw/mwclass/npc.cpp

@@ -1184,7 +1184,7 @@ namespace MWClass
             return;
         }
 
-        const NpcCustomData& customData = dynamic_cast<const NpcCustomData&>(*ptr.getRefData().getCustomData());
+        const NpcCustomData& customData = ptr.getRefData().getCustomData()->asNpcCustomData();
 
         customData.mInventoryStore.writeState (state2.mInventory);
         customData.mNpcStats.writeState (state2.mNpcStats);

apps/openmw/mwworld/customdata.cpp

@@ -63,5 +63,12 @@ MWClass::CreatureLevListCustomData &CustomData::asCreatureLevListCustomData()
     throw std::logic_error(error.str());
 }
 
+const MWClass::CreatureLevListCustomData &CustomData::asCreatureLevListCustomData() const
+{
+    std::stringstream error;
+    error << "bad cast " << typeid(this).name() << " to CreatureLevListCustomData";
+    throw std::logic_error(error.str());
+}
+
 
 }

apps/openmw/mwworld/customdata.hpp

@@ -35,6 +35,7 @@ namespace MWWorld
             virtual const MWClass::DoorCustomData& asDoorCustomData() const;
 
             virtual MWClass::CreatureLevListCustomData& asCreatureLevListCustomData();
+            virtual const MWClass::CreatureLevListCustomData& asCreatureLevListCustomData() const;
     };
 }