update libpng to version 1.6.37

11101b6f · Adrià Arrufat · Davis E. King · 23e50632 · 11101b6f · 11101b6f
Commit 11101b6f authored Aug 05, 2021 by Adrià Arrufat Committed by Davis E. King Aug 05, 2021
3 changed files
--- a/dlib/external/libpng/pngwrite.c
+++ b/dlib/external/libpng/pngwrite.c
--- a/dlib/external/libpng/pngwtran.c
+++ b/dlib/external/libpng/pngwtran.c
--- a/dlib/external/libpng/pngwutil.c
+++ b/dlib/external/libpng/pngwutil.c