Tweaks to keep the Microsoft compiler quiet.
diff --git a/Objects/listobject.c b/Objects/listobject.c
index 8aca28d..e2f6fd8 100644
--- a/Objects/listobject.c
+++ b/Objects/listobject.c
@@ -67,7 +67,7 @@
 	}
 	nbytes = size * sizeof(object *);
 	/* Check for overflow */
-	if (nbytes / sizeof(object *) != size) {
+	if (nbytes / sizeof(object *) != (size_t)size) {
 		return err_nomem();
 	}
 	op = (listobject *) malloc(sizeof(listobject));