Simplify and speedup uses of Py_BuildValue():

* Py_BuildValue("(OOO)",a,b,c)  -->  PyTuple_Pack(3,a,b,c)
* Py_BuildValue("()",a)         -->  PyTuple_New(0)
* Py_BuildValue("O", a)         -->  Py_INCREF(a)

Modules/almodule.c

@@ -901,7 +901,7 @@ alp_GetFrameTime(alpobject *self, PyObject *args)
 		Py_XDECREF(v1);
 		return NULL;
 	}
-	ret = Py_BuildValue("(OO)", v0, v1);
+	ret = PyTuple_Pack(2, v0, v1);
 	Py_DECREF(v0);
 	Py_DECREF(v1);
 	return ret;