DB48X: Turning a DM42 into an HP48

[c3d]

(11-11-2022 05:58 PM)synopsis Wrote:  Found the associated Gitlab but couldn't compile it for DM42

I just pushed a `dev` branch that has many Linux related fixes (mostly warnings, but one hard error). I will try to be more careful about keeping the Linux version building at all times. My primary dev platform is macOS, but I have a dozen Linux machines at home, so I can certainly take the time to build there as well.