added getEquipmentSkill function to Class hierarchy

apps/openmw/mwworld/class.cpp

@@ -127,11 +127,16 @@ namespace MWWorld
         return Ogre::Vector3 (0, 0, 0);
     }
 
-    std::pair<std::vector<int>, bool> Class::getEquipmentSlots (const Ptr& pt) const
+    std::pair<std::vector<int>, bool> Class::getEquipmentSlots (const Ptr& ptr) const
     {
         return std::make_pair (std::vector<int>(), false);
     }
 
+    int Class::getEuqipmentSkill (const Ptr& ptr, const Environment& environment) const
+    {
+        return -1;
+    }
+
     const Class& Class::get (const std::string& key)
     {
         std::map<std::string, boost::shared_ptr<Class> >::const_iterator iter = sClasses.find (key);

apps/openmw/mwworld/class.hpp

@@ -143,12 +143,18 @@ namespace MWWorld
             ///< Return desired movement vector (determined based on movement settings,
             /// stance and stats).
 
-            virtual std::pair<std::vector<int>, bool> getEquipmentSlots (const Ptr& pt) const;
+            virtual std::pair<std::vector<int>, bool> getEquipmentSlots (const Ptr& ptr) const;
             ///< \return first: Return IDs of the slot this object can be equipped in; second: can object
             /// stay stacked when equipped?
             ///
             /// Default implementation: return (empty vector, false).
 
+            virtual int getEuqipmentSkill (const Ptr& ptr, const Environment& environment)
+                const;
+            /// Return the index of the skill this item corresponds to when equiopped or -1, if there is
+            /// no such skill.
+            /// (default implementation: return -1)
+
             static const Class& get (const std::string& key);
             ///< If there is no class for this \a key, an exception is thrown.