Failures when downloading the Airfont DLS file

[pedrolcl]

Sonivox version

version: 3.6.15.0

Describe the bug

There are random and unpredictable failures when downloading the file that is needed for unit tests. For instance:

https://github.com/pedrolcl/sonivox/actions/runs/12331785067/job/34418799399

-- DLS file C:\msys64\tmp/soundfont.dls size: 0
-- DLS file C:\msys64\tmp/soundfont.dls MD5 hash: d41d8cd98f00b204e9800998ecf8427e

then...

Errors while running CTest
Output from these tests are in: D:/a/sonivox/sonivox/build/Testing/Temporary/LastTest.log
Use "--rerun-failed --output-on-failure" to re-run the failed cases verbosely.
Error: Process completed with exit code 8.

Another:

https://github.com/pedrolcl/sonivox/actions/runs/12561210048/job/35019728474

-- DLS file C:\msys64\tmp/soundfont.dls size: 74042205
-- DLS file C:\msys64\tmp/soundfont.dls MD5 hash: 3878bac723370aca5492d81e0a16a27a

The file was only partially downloaded.

Steps to reproduce the wrong behavior:

The failures seem to be random and unpredictable.

Expected behavior

The test file should be downloadable in all cases, and not corrupted. These are the correct size and hash:

-- DLS file C:\msys64\tmp/soundfont.dls size: 81362584
-- DLS file C:\msys64\tmp/soundfont.dls MD5 hash: 40c0cd4ad29ae411a8fc3d6681002a2b