From 5d32344e18d19345b67fad5f78bf5634daef6345 Mon Sep 17 00:00:00 2001
From: "David C. Lonie" <david.lonie@kitware.com>
Date: Wed, 8 Oct 2014 13:46:10 -0400
Subject: [PATCH] Don't attempt to render NULL strings.

Change-Id: I54a664d7c4b0dc8824a099b035e26872f0b6fa7f
---
 Rendering/GL2PS/vtkGL2PSUtilities.cxx | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Rendering/GL2PS/vtkGL2PSUtilities.cxx b/Rendering/GL2PS/vtkGL2PSUtilities.cxx
index 685b28871a0..8d3c8463b5b 100644
--- a/Rendering/GL2PS/vtkGL2PSUtilities.cxx
+++ b/Rendering/GL2PS/vtkGL2PSUtilities.cxx
@@ -44,6 +44,11 @@ float vtkGL2PSUtilities::LineWidthFactor = 5.f / 7.f;
 void vtkGL2PSUtilities::DrawString(const char *str,
                                    vtkTextProperty *tprop, double pos[])
 {
+  if (!str)
+    {
+    return;
+    }
+
   vtkTextRenderer *tren(vtkTextRenderer::GetInstance());
   if (tren == NULL)
     {