From 5ed764178a7ff43d30ced21ffa8d5f36c64074c8 Mon Sep 17 00:00:00 2001
From: Robin Gareus <robin@gareus.org>
Date: Sat, 29 Oct 2016 03:13:59 +0200
Subject: Fix crash with empty patch-names.

An empty text will not produce a bounding box.
---
 libs/canvas/flag.cc | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/libs/canvas/flag.cc b/libs/canvas/flag.cc
index 2d0bdb2830..d0ce5af2b1 100644
--- a/libs/canvas/flag.cc
+++ b/libs/canvas/flag.cc
@@ -72,7 +72,11 @@ Flag::set_font_description (Pango::FontDescription font_description)
 void
 Flag::set_text (string const & text)
 {
-	_text->set (text);
+	if (text.empty ()) {
+		_text->set (" ");
+	} else {
+		_text->set (text);
+	}
 	boost::optional<Rect> bbox = _text->bounding_box ();
 	assert (bbox);
 
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