Fixed another silly bitflag error in InstanceManagerFlags.
Fixed another silly bitflag error in InstanceManagerFlags.

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