Compilation failure with obs-studio-32.0.1: Faiure fatal error: 'util/circlebuf.h' file not found

```
In file included from /usr/ports/multimedia/obs-waveform/work/waveform-1.9.0-beta1/src/module.cpp:19:
/usr/ports/multimedia/obs-waveform/work/waveform-1.9.0-beta1/src/source.hpp:21:10: fatal error: 'util/circlebuf.h' file not found
   21 | #include <util/circlebuf.h>
      |          ^~~~~~~~~~~~~~~~~~
1 error generated.
```