Fixed getting the alpha value in GetNormalizedCrossCorrelationDistortion.
Fixed getting the alpha value in GetNormalizedCrossCorrelationDistortion.

Danack/ImageMagick,UniQP/ImageMagick,kwm81/ImageMagick,kwm81/ImageMagick,Danack/ImageMagick,Danack/ImageMagick,Danack/ImageMagick,kwm81/ImageMagick,UniQP/ImageMagick,UniQP/ImageMagick,Danack/ImageMagick,kwm81/ImageMagick,UniQP/ImageMagick,UniQP/ImageMagick,kwm81/ImageMagick,kwm81/ImageMagick,Danack/ImageMagick,UniQP/ImageMagick