[OGRE-67]: Fix water sample mem leaks
[OGRE-67]: Fix water sample mem leaks

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