fix-mapbuffer长度和需要的不符
fix-mapbuffer长度和需要的不符

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