PortChecker test seems to break in out of tree builds

[dvzrv]

Hi! When working on the package for 3.0.6 and the CI integration for Arch Linux, I noticed that the PortChecker test started failing.

I believe this is due to building out of tree (i.e. build directory is not in project directory).
The test should not fail on this not uncommon scenario.

[JohannesLorenz]

Reproduced with current zyn's master on 1 Arch Linux machine sometimes, but it always works with onther Arch linux machine. On one of my machines, it builds fine if the build directory is 1 level under the source tree, but fails sometimes in all other cases (i.e. 2 levels beneath, or in /tmp). The only thing I observe currently is that zyn does not reply anything at all.

It's a really strange issue. If a relative path would be wrong, then it would fail on both Arch Linux machines always.

@dvzrv I just pushed a fix on current master (that uses the MIDI dummy engine) that might fix the issue. Can you please re-try?

[dvzrv]

I guess you are referring to 6e25116?

That did not fix the issue unfortunately.

[JohannesLorenz]

I guess you are referring to 6e25116?

Yes, I mean that one. Hmm, I need to continue debugging it.