From 72556fddc3df08084623241aa8031f762efa228c Mon Sep 17 00:00:00 2001
From: Vincent Lejeune <vljn@ovi.com>
Date: Mon, 24 Mar 2014 21:47:24 +0100
Subject: [PATCH] Don't use glDebugMessageCallbackARB if null

---
 src/graphics/glwrap.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/graphics/glwrap.cpp b/src/graphics/glwrap.cpp
index e0c384d9a..6f6f82026 100644
--- a/src/graphics/glwrap.cpp
+++ b/src/graphics/glwrap.cpp
@@ -202,7 +202,8 @@ void initGL()
 #endif
 #endif
 #ifdef ARB_DEBUG_OUTPUT
-    glDebugMessageCallbackARB((GLDEBUGPROCARB)debugCallback, NULL);
+    if (glDebugMessageCallbackARB)
+        glDebugMessageCallbackARB((GLDEBUGPROCARB)debugCallback, NULL);
 #endif
 }