Make fixed_power also work for data types that have no implicit conversion from int by avoiding setting the return value to 1 for N==0 (only N>0 allowed anyway).
Make fixed_power also work for data types that have no implicit conversion from int by avoiding setting the return value to 1 for N==0 (only N>0 allowed anyway).

git-svn-id: 31d9d2f6432a47c86a3640814024c107794ea77c@29355 0785d39b-7218-0410-832d-ea1e28bc413d

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