From 11bc1b2a77e100e9086c967e9a73c3750555a7b2 Mon Sep 17 00:00:00 2001
From: Robert Osfield <robert@openscenegraph.com>
Date: Sat, 31 Aug 2002 09:51:52 +0000
Subject: [PATCH] Bug fix from Tom Jolly, which adds a check aginst a delete of
 gl textures in FTGLTextureFont destructor to prevent a NULL be passed to
 glDeleteTextures. This solves the crash on exit of osghud/osgtext.

---
 src/osgText/FTGLTextureFont.cpp | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/osgText/FTGLTextureFont.cpp b/src/osgText/FTGLTextureFont.cpp
index 21087cb21..b4e5ef402 100644
--- a/src/osgText/FTGLTextureFont.cpp
+++ b/src/osgText/FTGLTextureFont.cpp
@@ -50,8 +50,11 @@ FTGLTextureFont::~FTGLTextureFont()
     ContextTextureId::iterator itr;
     for(itr=glContextTextureID.begin();itr != glContextTextureID.end(); itr++)
     {
-        glDeleteTextures( numTextures, (const GLuint*)*itr);
-        osgDelete [] *itr;
+        if (*itr)
+        {
+            glDeleteTextures( numTextures, (const GLuint*)*itr);
+            osgDelete [] *itr;
+        }
     }
 }