Fix coverity issue:

* CID 332682: Resource leak
* CID 350607: Resource leak
* CID 332677: Resource leak

src/Mod/Path/App/AppPathPy.cpp

@@ -430,7 +430,7 @@ private:
 
 PyObject* initModule()
 {
-    return (new Module)->module().ptr();
+    return Base::Interpreter().addModule(new Module);
 }
 
 } // namespace Path