ortho: use 'UNUSED' to suppress warnings about debug functions
As an alternative to hiding these functions by guarding them with `DEBUG`, this
allows the compiler to see and parse these functions even when not building in
debug mode. This means we can catch syntax errors that slip into this code even
when it is not being emitted into the final binary.
This has little effect right now as debugging is forced on in this file, but
this may be a nice extra safe guard in future.
projects / graphviz / commit