py3: FEM, PyMods, preprocessor conditions, Py::Long vs Py::Int

src/Mod/Fem/Gui/AppFemGui.cpp

@@ -92,14 +92,14 @@ extern PyObject* initModule();
 
 
 /* Python entry */
-PyMODINIT_FUNC initFemGui()
+PyMOD_INIT_FUNC(FemGui)
 {
     if (!Gui::Application::Instance) {
         PyErr_SetString(PyExc_ImportError, "Cannot load Gui module in console application.");
-        return;
+        PyMOD_Return(0);
     }
 
-    (void) FemGui::initModule();
+    PyObject* mod = FemGui::initModule();
     Base::Console().Log("Loading GUI of Fem module... done\n");
 
     // instantiating the commands
@@ -161,4 +161,6 @@ PyMODINIT_FUNC initFemGui()
 
      // add resources and reloads the translators
     loadFemResource();
+    
+    PyMOD_Return(mod);
 }