Add in missing 'FLAG_DRAW_NEXT_FRAME_IF_VISIBLE' to Flag enun

scene/3d/visual_instance.h

@@ -89,6 +89,7 @@ class GeometryInstance : public VisualInstance {
 public:
 	enum Flags {
 		FLAG_USE_BAKED_LIGHT = VS::INSTANCE_FLAG_USE_BAKED_LIGHT,
+		FLAG_DRAW_NEXT_FRAME_IF_VISIBLE = VS::INSTANCE_FLAG_DRAW_NEXT_FRAME_IF_VISIBLE,
 		FLAG_MAX = VS::INSTANCE_FLAG_MAX,
 	};