[libpng16] Replace png_set_add_alpha with png_set_trns_to_alpha in fuzzer.
diff --git a/contrib/oss-fuzz/libpng_read_fuzzer.cc b/contrib/oss-fuzz/libpng_read_fuzzer.cc
index 2893f61..6566bff 100644
--- a/contrib/oss-fuzz/libpng_read_fuzzer.cc
+++ b/contrib/oss-fuzz/libpng_read_fuzzer.cc
@@ -5,7 +5,7 @@
// Use of this source code is governed by a BSD-style license that may
// be found in the LICENSE file https://cs.chromium.org/chromium/src/LICENSE
-// Last changed in libpng 1.6.35 [October 14, 2017]
+// Last changed in libpng 1.6.35 [October 30, 2017]
// The modifications in 2017 by Glenn Randers-Pehrson include
// 1. addition of a PNG_CLEANUP macro,
@@ -166,7 +166,7 @@
png_set_expand(png_handler.png_ptr);
png_set_packing(png_handler.png_ptr);
png_set_scale_16(png_handler.png_ptr);
- png_set_add_alpha(png_handler.png_ptr, 0xffff, PNG_FILLER_AFTER);
+ png_set_tRNS_to_alpha(png_handler.png_ptr);
int passes = png_set_interlace_handling(png_handler.png_ptr);
