Accept a ConstPtr in ContainerStore::getType

apps/openmw/mwworld/containerstore.cpp

@@ -585,7 +585,7 @@ float MWWorld::ContainerStore::getWeight() const
     return mCachedWeight;
 }
 
-int MWWorld::ContainerStore::getType (const Ptr& ptr)
+int MWWorld::ContainerStore::getType (const ConstPtr& ptr)
 {
     if (ptr.isEmpty())
         throw std::runtime_error ("can't put a non-existent object into a container");

apps/openmw/mwworld/containerstore.hpp

@@ -163,7 +163,7 @@ namespace MWWorld
             float getWeight() const;
             ///< Return total weight of the items contained in *this.
 
-            static int getType (const Ptr& ptr);
+            static int getType (const ConstPtr& ptr);
             ///< This function throws an exception, if ptr does not point to an object, that can be
             /// put into a container.