Fix off-by-one error in determining whether to call TerrainQuadTreeNode::useAncestorVertexData
Fix off-by-one error in determining whether to call TerrainQuadTreeNode::useAncestorVertexData

--HG--
extra : convert_revision : svn%3A8631bf8a-c64b-0410-883c-f3eb003322f7/trunk%40778

ruleless/ogre,ruleless/ogre,largerussiangames/ogre,ehsan/ogre,nezticle/ogre,bhlzlx/ogre,jhu-lcsr-forks/ogre,vancepym/ogre,vancepym/ogre,ehsan/ogre,ehsan/ogre,vancepym/ogre,ruleless/ogre,bhlzlx/ogre,nezticle/ogre,ruleless/ogre,largerussiangames/ogre,nezticle/ogre,vancepym/ogre,largerussiangames/ogre,jhu-lcsr-forks/ogre,jhu-lcsr-forks/ogre,ehsan/ogre,ruleless/ogre,bhlzlx/ogre,bhlzlx/ogre,vancepym/ogre,bhlzlx/ogre,bhlzlx/ogre,ehsan/ogre,largerussiangames/ogre,jhu-lcsr-forks/ogre,nezticle/ogre,ruleless/ogre,jhu-lcsr-forks/ogre