Fixed SceneManager::createInstancedEntity, which was raising an exception when a manager was found, not when it wasn't
Fixed SceneManager::createInstancedEntity, which was raising an exception when a manager was found, not when it wasn't

digimatic/ogre,digimatic/ogre,digimatic/ogre,digimatic/ogre,digimatic/ogre,digimatic/ogre,digimatic/ogre