John Bowler 04402a9126 Fix (work round) rgb-to-gray issues in libpng 1.6
The previous attempts to ignore the errors in the code aren't quite enough to
deal with the 'channel selection' encoding added to libpng 1.7; abort.
pngvalid.c is changed to drop this encoding in prior versions.

Signed-off-by: John Bowler <jbowler@acm.org>
2015-09-26 17:41:02 -07:00
..
2015-09-25 13:10:13 -07:00