Issue #1113244: Py_XINCREF, Py_DECREF, Py_XDECREF: Add `do { ... } while (0)'
to avoid compiler warnings.
diff --git a/Modules/readline.c b/Modules/readline.c
index f5a54bc..d09f09c 100644
--- a/Modules/readline.c
+++ b/Modules/readline.c
@@ -694,13 +694,13 @@
 	r = PyObject_CallFunction(completion_display_matches_hook,
 				  "sOi", matches[0], m, max_length);
 
-	Py_DECREF(m), m=NULL;
+	Py_DECREF(m); m=NULL;
 	
 	if (r == NULL ||
 	    (r != Py_None && PyInt_AsLong(r) == -1 && PyErr_Occurred())) {
 		goto error;
 	}
-	Py_XDECREF(r), r=NULL;
+	Py_XDECREF(r); r=NULL;
 
 	if (0) {
 	error: