增加校验原图数据变化的代码，to be delete
增加校验原图数据变化的代码，to be delete

guanzidashu/guetzli_ios_metal,guanzidashu/guetzli_ios_metal,guanzidashu/guetzli_ios_metal,ianhuang-777/guetzli,ianhuang-777/guetzli,ianhuang-777/guetzli,ianhuang-777/guetzli,guanzidashu/guetzli_ios_metal