Compile fix for platforms other than OS X.
Compile fix for platforms other than OS X.

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