Fix gcc warning about Root being a virtual class (it shouldn't be)
Fix gcc warning about Root being a virtual class (it shouldn't be)

RealityFactory/ogre,vbudovski/ogre,OGRECave/ogre,paroj/ogre,paroj/ogre,vbudovski/ogre,vbudovski/ogre,vbudovski/ogre,RealityFactory/ogre,vbudovski/ogre,RealityFactory/ogre,OGRECave/ogre,OGRECave/ogre,OGRECave/ogre,paroj/ogre,RealityFactory/ogre,OGRECave/ogre,RealityFactory/ogre,paroj/ogre,paroj/ogre