From 9e7870dea599149b2b94bd9c1af74eb15e682fb5 Mon Sep 17 00:00:00 2001
From: Rivo Laks <rivolaks@hot.ee>
Date: Thu, 27 Sep 2007 19:04:18 +0000
Subject: [PATCH] Don't try to use glx when it's not available. Fixes crash
 when glx is there at compile time but not at runtime.

svn path=/trunk/KDE/kdebase/workspace/; revision=717942
---
 compositingprefs.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/compositingprefs.cpp b/compositingprefs.cpp
index ec7178c385..d21453f452 100644
--- a/compositingprefs.cpp
+++ b/compositingprefs.cpp
@@ -58,6 +58,12 @@ void CompositingPrefs::detect()
         }
 
 #ifdef HAVE_OPENGL
+    if( !Extensions::glxAvailable())
+        {
+        kDebug( 1212 ) << "No GLX available";
+        return;
+        }
+
     // remember and later restore active context
     GLXContext oldcontext = glXGetCurrentContext();
     GLXDrawable olddrawable = glXGetCurrentDrawable();