png_free_ptr_NULL   74 third_party/libpng/pngmem.c    png_destroy_struct_2(struct_ptr, png_free_ptr_NULL, png_voidp_NULL);
png_free_ptr_NULL  405 third_party/libpng/pngmem.c    png_destroy_struct_2(struct_ptr, png_free_ptr_NULL, png_voidp_NULL);
png_free_ptr_NULL   31 third_party/libpng/pngread.c       warn_fn, png_voidp_NULL, png_malloc_ptr_NULL, png_free_ptr_NULL));
png_free_ptr_NULL  463 third_party/libpng/pngwrite.c       warn_fn, png_voidp_NULL, png_malloc_ptr_NULL, png_free_ptr_NULL));