tree bd0a843a8c30a356d132a4604344b9b32df906d1
parent 9fbdce8fb5a227b18e392e1603be0214a29fc569
author Glenn Randers-Pehrson <glennrp at users.sourceforge.net> 1433004885 -0500
committer Glenn Randers-Pehrson <glennrp at users.sourceforge.net> 1433004885 -0500

[libpng16] Backported filter selection code from libpng-1.7.0beta51, to combine

sub_row, up_row, avg_row, and paeth_row into try_row and tst_row.