Codechange: Use EnumBitSet for WindowFlags.

src/waypoint_gui.cpp

@@ -94,7 +94,7 @@ public:
 		this->FinishInitNested(window_number);
 
 		this->owner = this->wp->owner;
-		this->flags |= WF_DISABLE_VP_SCROLL;
+		this->flags.Set(WindowFlag::DisableVpScroll);
 
 		NWidgetViewport *nvp = this->GetWidget<NWidgetViewport>(WID_W_VIEWPORT);
 		nvp->InitializeViewport(this, this->GetCenterTile(), ScaleZoomGUI(ZOOM_LVL_VIEWPORT));