Reading a PNG file with libpng with a chunk bigger than the 8 MiB
default chunk size limit set by libpng results in a libpng error, e.g.
"iTXt: chunk data is too large" for a too big iTXt chunk.

Fix this by disabling the chunk size limit.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=52147Signed-off-by: Torge Matthies <openglfreak@googlemail.com>
Signed-off-by: Esme Povirk <esme@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>