Change text chunk limit to 32767 to be consistent with libpng-1.2.
Change text chunk limit to 32767 to be consistent with libpng-1.2.


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