This diff is purely informational.
Without this patch compilation of plasma-workspace fails with:
~/bin/kde-latest/include/ksysguard/processcore/processes.h:61:54: error: ‘null’ is not a member of ‘QString’
Processes(const QString &hostname = QString::null, QObject * parent = nullptr);
^~~~
make[2]: *** [systemmonitor/CMakeFiles/systemmonitor.dir/build.make:63: systemmonitor/CMakeFiles/systemmonitor.dir/ksystemactivitydialog.cpp.o] Error 1
make[1]: *** [CMakeFiles/Makefile2:3206: systemmonitor/CMakeFiles/systemmonitor.dir/all] Error 2
make: *** [Makefile:130: all] Error 2
*** Failure: Exit code 2 **Maybe this is a real fix, may not.
BTW, I'm very curious to know why libksysguard and ksysguard compile without this patch, while plasma-workspace does not.