[vorbis-dev] trivial optimization to psy.c

[Timothy J. Wood]

>If you're compiler aint that great at optimizing, it might give you a touch
>extra speed. Of course, the fabs() is going to take up most of the time here,
>so it's probably pretty academic anyway... :)

  fabs is a builtin on most compilers that translates to a single FP  
instruction.  The load/store will be much more expensive.

-tim

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