For libpng12, it looks like these are the needed commits:
https://github.com/glennrp/libpng/commit/216dbf7f7eef5d999f2e3ba054407917098e9f85 https://github.com/glennrp/libpng/commit/3939689e7d9d06ee05411210bc8e605adcff294e https://github.com/glennrp/libpng/commit/475bab6170f651b9863e9fc1b8ffd6cd89a45aa0
For libpng12, it looks like these are the needed commits:
https:/ /github. com/glennrp/ libpng/ commit/ 216dbf7f7eef5d9 99f2e3ba0544079 17098e9f85 /github. com/glennrp/ libpng/ commit/ 3939689e7d9d06e e05411210bc8e60 5adcff294e /github. com/glennrp/ libpng/ commit/ 475bab6170f651b 9863e9fc1b8ffd6 cd89a45aa0
https:/
https:/