ENH: Use better local variables in VnlFFT1DComplexToComplexImageFilter.
ENH: Use better local variables in VnlFFT1DComplexToComplexImageFilter.

KitwareMedical/ITKUltrasound,KitwareMedical/ITKUltrasound,thewtex/ITKUltrasound,thewtex/ITKUltrasound,KitwareMedical/ITKUltrasound,thewtex/ITKUltrasound