[FFmpeg-cvslog] pngenc: Fix incorrect mask used for interlaced mode.

[Carl Eugen Hoyos]

Clément Bœsch <ubitux <at> gmail.com> writes:

> Also, it looks like ff_png_pass_mask is now local to pngdec.

Please just commit such changes (imo).

> Last, since this is a regression, maybe a fate test could be added? 
> The ticket provides samples we could use.

The following is sufficient:
$ ffmpeg -i tests/lena.pnm -flags +ildct+ilme out.png

Carl Eugen