From 5321e3b36eaadf32f6658fd509682a48b4584980 Mon Sep 17 00:00:00 2001
From: Keith OHara <k-ohara5a5a@oco.net>
Date: Fri, 19 Jun 2015 20:41:10 -0700
Subject: [PATCH 1/1] balloon-text: robust with empty stencils; issue 4447

---
 lily/balloon.cc | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lily/balloon.cc b/lily/balloon.cc
index 2b898c3d25..7e8067a577 100644
--- a/lily/balloon.cc
+++ b/lily/balloon.cc
@@ -88,8 +88,8 @@ Balloon_interface::print_spanner (SCM smob)
 SCM
 Balloon_interface::internal_balloon_print (Grob *me, Grob *p, Offset off)
 {
-  Box b (p->extent (p, X_AXIS),
-         p->extent (p, Y_AXIS));
+  Box b (robust_relative_extent (p, p, X_AXIS),
+         robust_relative_extent (p, p, Y_AXIS));
   Real padding = robust_scm2double (me->get_property ("padding"), .1);
   b.widen (padding, padding);
 
-- 
2.39.2