Fix bug 294: terrain blend painting in GL too slow
Fix bug 294: terrain blend painting in GL too slow

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