py3: add PyMOD_INIT_FUNC

from: py3: ported module init to python3, wwmayer

src/Base/PyObjectBase.h

@@ -84,6 +84,21 @@
  */
 #define PYFUNCIMP_S(CLASS,SFUNC) PyObject* CLASS::SFUNC (PyObject *self,PyObject *args,PyObject *kwd)
 
+
+/** Macro for initialization function of Python modules. 
+ */
+#if PY_MAJOR_VERSION >= 3
+# define PyMOD_INIT_FUNC(name) PyMODINIT_FUNC PyInit_##name(void)
+#else
+# define PyMOD_INIT_FUNC(name) PyMODINIT_FUNC init##name(void)
+#endif
+
+#if PY_MAJOR_VERSION >= 3
+# define PyMOD_Return(name) return name
+#else
+# define PyMOD_Return(name) return
+#endif
+
 /**
  * Union to convert from PyTypeObject to PyObject pointer.
  */