Fix AddComponent in C[Entity]EquippedEntity Classes

[allsey87]

During checking my code, I noticed that the constructor initialisation path for many of the CEntityEquippedEntity entities is somewhat broken. The method AddComponent will add components to the composable entity correctly, however, the update components specialisation in the class (which uses an anchor and an offset often defined in a struct inside the class) would have no effect on these components. To this end, I propose applying the following pattern to the affected classes:

class CEntityEquippedEntity {
public:
   virtual void Init(TConfigurationNode& t_tree) {
      /* initialization code to init the entity, find its anchor, offset etc */
      AddComponent(pc_entity, s_anchor, c_offset);
   }

   /* new public version of AddComponent */
   (virtual) void AddComponent(CEntity* pc_entity, SAnchor& s_anchor,  CVector3& c_offset) {
      m_vecInstances.push_back(new SInstance(*pc_entity, s_anchor, c_offset));
      AddComponent(pc_entity);
   }

private:
   /* override the inherited AddComponent and make it private so only we
      can call this function (I think this should work) */
   virtual void AddComponent(CEntity* pc_entity) {
      CComposableEntity::AddComponent(pc_entity);
   }

};

I would say that this issue isn't urgent, but I think it should be fixed at some point in the future.