propagate default argument from header file to the python export

modules/gfx/pymod/export_scene.cc

@@ -143,7 +143,7 @@ void export_Scene()
     .def("CenterOn",center_on2)
     .def("UnProject",  &Scene::UnProject, arg("ignore_vp")=false)
     .def("Project",  &Scene::Project, arg("ignore_vp")=false)
-    .def("InitGL", &Scene::InitGL)
+    .def("InitGL", &Scene::InitGL, arg("full")=true)
     .def("RenderGL", &Scene::RenderGL)
     .def("Resize", &Scene::Resize)
     .def("HasNode", &Scene::HasNode)