Fix Cmake error with VS 2010
Fix Cmake error with VS 2010

--HG--
branch : v1-7

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