Make scale (subject) in Mixer a pointer
Neutralize warning because initialization order
Add menu entry to toggle turbo

Catch infinite loop when a char is set to cin instead of int
(By getting a char and calling atoi)
Merge branch 'fix-chris-bugs'

* fix-chris-bugs:
  Add menu entry to toggle turbo
  Neutralize warning because initialization order
  Make scale (subject) in Mixer a pointer