Fix other problems since commit f6e5696...

... Problem with static initialization order of ReservedCommandFlags, caused
wrong enablement of menu items (at least on Mac), such as Plot Spectrum or
Contrast enabled when there was no selection

lib-src/mod-null/ModNullCallback.cpp

@@ -164,12 +164,12 @@ int ModuleDispatch(ModuleDispatchTypes type)
             _T("A New Command"), // internal name
             XO("1st Experimental Command..."), //displayed name
             ident, ModNullFN( OnFuncFirst ),
-            AudioIONotBusyFlag );
+            AudioIONotBusyFlag() );
          c->AddItem( *p,
             _T("Another New Command"),
             XO("2nd Experimental Command"),
             ident, ModNullFN( OnFuncSecond ),
-            AudioIONotBusyFlag );
+            AudioIONotBusyFlag() );
          c->ClearCurrentMenu();
    }
       break;