updator.bat's assume-unchanged step compared "cosmic rage\worlds\cosmic
rage\cosmic rage.mcl" against git's actual tracked casing
(worlds\Cosmic Rage\cosmic rage.MCL) - git's index is case-sensitive
even on a case-insensitive filesystem, so `if exist` found the file
fine but `git update-index --assume-unchanged` couldn't match it,
producing the "Could not mark ... as assume-unchanged" warning. Fixed
the casing.
Also replaced the full-volume (100) announcement.ogg alert on an
outdated soundpack with a utils.msgbox popup - it was startling people
with no way to turn it down. Bonus: a native Windows dialog gets read
by screen readers automatically, which is arguably better for
accessibility than an unskippable sound cue anyway.
e38ab9e463