Fixed object-handler-install bug

Mac/Modules/waste/wastemodule.c

@@ -1846,7 +1846,7 @@ static PyObject *waste_WEInstallObjectHandler(_self, _args)
 				PyMac_GetOSType, &objectType,
 				PyMac_GetOSType, &selector,
 				&py_handler,
-				ExistingwasteObj_New, &we) ) return NULL;
+				WEOObj_Convert, &we) ) return NULL;
 				
 		if ( selector == weNewHandler ) handler = (UniversalProcPtr)upp_new_handler;
 		else if ( selector == weDisposeHandler ) handler = (UniversalProcPtr)upp_dispose_handler;