If you ring the boxing bell right at the start of the game, you'll see
Indy hit it 3 times, but the actual bell sound will only be heard twice.
This doesn't happen in the original interpreter or in the other releases
where it can be heard 3 times as expected. Another example is the sound
effect for thunder when Indy is outside the windows of Castle Brunwald;
although it sounds a bit weird this way, the sound is really meant to
have some quick "false starts".
The byte at offset 26 might be responsible for this, in that if it's
unset, the current (identical?) sound is maybe meant to be interrupted.
This is just based on the Indy3 Amiga fixes brought by PR#3598, and
from some naive guesswork. But this change is only applied to Indy3 Mac
and appears to cause no regression (I've done a full gameplay).
Thus, until someone checks this against the original Indy3 Macintosh
interpreter (we have no disasm for it yet), doing this change probably
makes sense for now...
And Andy says I should be more confident about this change :p
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