Added PyMac_BuildOptStr255, which returns None on a null pointer.
diff --git a/Mac/Include/macglue.h b/Mac/Include/macglue.h
index 5e39044..bc1939f 100644
--- a/Mac/Include/macglue.h
+++ b/Mac/Include/macglue.h
@@ -105,6 +105,7 @@
int PyMac_GetStr255(PyObject *, Str255); /* argument parser for Str255 */
PyObject *PyMac_BuildStr255(Str255); /* Convert Str255 to PyObject */
+PyObject *PyMac_BuildOptStr255(Str255); /* Convert Str255 to PyObject, NULL to None */
int PyMac_GetFSSpec(PyObject *, FSSpec *); /* argument parser for FSSpec */
PyObject *PyMac_BuildFSSpec(FSSpec *); /* Convert FSSpec to PyObject */