[Bug 42090] Highway Pursuit constantly emits loud noise when sound effects enabled

https://bugs.winehq.org/show_bug.cgi?id=42090

--- Comment #3 from Andrew Eikum  ---
Created attachment 56621
  --> https://bugs.winehq.org/attachment.cgi?id=56621
dsound: Fix rolloff factor calculation

This patch should correct the rolloff factor calculation. It behaves much more
like native dsound in the tests.

It doesn't quite fix the game, however. The sound effects are still a little
too loud, I think. The game does use the doppler effect to change pitch, and in
my testing it affected the length of the played sample. Maybe that ties in
here, too?