Added an error message when using FSRef objects on platforms that don't
support them.
diff --git a/Mac/Modules/macfsmodule.c b/Mac/Modules/macfsmodule.c
index 61127aa..9b635e3 100644
--- a/Mac/Modules/macfsmodule.c
+++ b/Mac/Modules/macfsmodule.c
@@ -1131,6 +1131,7 @@
 PyMac_GetFSRef(PyObject *v, FSRef *fsr)
 {
 #if TARGET_API_MAC_OS8
+	PyErr_SetString(PyExc_TypeError, "FSRef objects not supported on this platform");
 	return 0;
 #else
 	/* If it's an FSRef we're also okay. */