[Zint-barcode] Bug in MSYS2 environment when using --direct.

[<fa...@ri...>]

Hello,

I compile the zint master branch in an up-to-date MSYS2 (ucrt64)
environment.  zlib and libpng are MSYS2 packages.

I compile with cmake from the command line:
cd zint
cmake.exe -G Ninja -DCMAKE_BUILD_TYPE=Release
-DCMAKE_INSTALL_PREFIX=/tmp -DZINT_USE_QT=OFF -B build
cmake --build build --config Release
cmake --install build

I issue the following commands:
cd /tmp/bin
./zint -d 'hello'
./zint -d 'hello' --direct --filetype png > out-direct.png
diff -y <(hexdump -c out.png) <(hexdump -c out-direct.png) | grep
--color '\\[rn]'

Pay attention to the \r\n sequences which are wrong in out-direct.png.
(diff does a terrible job to compare the output but it's good enough to
highlight the issue here).

Regards,
Frank