Fixed incorrect GetPixelChannels calls in ScaleImage.
Fixed incorrect GetPixelChannels calls in ScaleImage.

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