power: Fix exponent being used uninitialized.
power: Fix exponent being used uninitialized.

Ignore-this: 1f80439a2b96702f589950bc1522feb2

darcs-hash:20110310042957-c78a8-5fcb9237227c9c59bf142048154c209bc4885142

graue/truesynth,graue/truesynth