“pixelDensity() cannot be used here” in static mode sketches (regression from 3.x)

*Created by: benfry*

A sketch with nothing but this code worked in 3.x:

```processing
pixelDensity(displayDensity());
```

But now throws an error saying `pixelDensity() cannot be used here`, presumably because the preprocessor isn't correctly pulling the method out to place it inside `settings()` behind the scenes.