added exception to prevent silent fail in GL render system when trying to retrieve monitor information; fixes [OGRE-127]
added exception to prevent silent fail in GL render system when trying to retrieve monitor information; fixes [OGRE-127]

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