From 1ee1b504ff2988880a512752834517f950cf615a Mon Sep 17 00:00:00 2001
From: buliabyak <buliabyak@users.sourceforge.net>
Date: Sun, 15 Jul 2007 14:49:36 +0000
Subject: [PATCH] fix crash with empty parameter string

---
 src/extension/parameter.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/extension/parameter.cpp b/src/extension/parameter.cpp
index b35052a0e..f59a5cc3d 100644
--- a/src/extension/parameter.cpp
+++ b/src/extension/parameter.cpp
@@ -917,6 +917,9 @@ ParamFloat::string (void)
 Glib::ustring *
 ParamString::string (void)
 {
+    if (_value == NULL)
+        return new Glib::ustring("");
+
     // FIXME: I think the string should NOT be escaped. Just put between "..."
     // Otherwise \frac{1}{2} will become \\frac{1}{2} and then the LaTeX effect won't work....
     //gchar * esc = g_strescape(_value, NULL);
-- 
2.30.2