commit ad8def49f84c2bbfb7d45a74e94c4d273d588198
Author: Richard C. Gobeille <richard@voidpoint.com>
Date:   Tue Jun 29 12:42:46 2021 -0700

    Duke3d: animate menus independently from totalclock
    
    Fixes terminx/eduke32#83

commit 1bc4006f1d1d84411940606f1cfa4b6cb9cc6e94
Author: Richard C. Gobeille <richard@voidpoint.com>
Date:   Tue Jun 29 12:31:41 2021 -0700

    engine: apply 88f90a19 to SDL 1.2 builds

commit 307b51de4122c55818263d90eaf0930e81ffef6d
Author: Richard C. Gobeille <richard@voidpoint.com>
Date:   Tue Jun 29 12:30:23 2021 -0700

    Duke3d, engine: hijack unused parameter passed to videoShowFrame()
    
    A value of -1 now indicates that the GL state should be preserved.
    
    This is used to fix terminx/eduke32#159

commit 6144f3be20ce1639b850c31bbfb98163351f7a9b
Author: Richard C. Gobeille <richard@voidpoint.com>
Date:   Tue Jun 29 12:24:54 2021 -0700

    engine: fix warnings introduced by e0ee1bfe

See https://voidpoint.io/terminx/eduke32 for more details.