glxspheres: handle new SDL platform enumerations
glxspheres: handle new SDL platform enumerations

ValveSoftware/vogl,ValveSoftware/vogl,bclemetsonblizzard/vogl,kingtaurus/vogl,ValveSoftware/vogl,bclemetsonblizzard/vogl,bclemetsonblizzard/vogl,bclemetsonblizzard/vogl,kingtaurus/vogl,ValveSoftware/vogl,kingtaurus/vogl,bclemetsonblizzard/vogl,kingtaurus/vogl