Part of pull req. 131. Verify that a valid LOD strategy name has been given to prevent a segfault.
Part of pull req. 131. Verify that a valid LOD strategy name has been given to prevent a segfault.

--HG--
branch : v1-9

jhu-lcsr-forks/ogre,jhu-lcsr-forks/ogre,jhu-lcsr-forks/ogre,jhu-lcsr-forks/ogre,jhu-lcsr-forks/ogre