bug fix in offset
bug fix in offset

tingxingdong/rocFFT-1,tingxingdong/rocFFT-1,bragadeesh/rocFFT,bragadeesh/rocFFT,tingxingdong/rocFFT-1,bragadeesh/rocFFT,ROCmSoftwarePlatform/rocFFT,ROCmSoftwarePlatform/rocFFT,ROCmSoftwarePlatform/rocFFT,ROCmSoftwarePlatform/rocFFT