From 8dccc889afac845f33f2073ac7167450d3158bd3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Thomas=20L=C3=BCbking?= <thomas.luebking@gmail.com>
Date: Mon, 14 Feb 2011 20:38:31 +0100
Subject: [PATCH] secure m_highlightedWindows access when triggering explicit
 repaint in highlight effect

---
 effects/highlightwindow/highlightwindow.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/effects/highlightwindow/highlightwindow.cpp b/effects/highlightwindow/highlightwindow.cpp
index b41741ed4..79f33f10c 100644
--- a/effects/highlightwindow/highlightwindow.cpp
+++ b/effects/highlightwindow/highlightwindow.cpp
@@ -245,7 +245,8 @@ void HighlightWindowEffect::prepareHighlighting()
     foreach( EffectWindow *w, effects->stackingOrder() )
         if( !m_windowOpacity.contains( w )) // Just in case we are still finishing from last time
             m_windowOpacity[w] = isInitiallyHidden( w ) ? 0.0 : 1.0;
-    m_highlightedWindows.at(0)->addRepaintFull();
+    if (!m_highlightedWindows.isEmpty())
+        m_highlightedWindows.at(0)->addRepaintFull();
     }
 
 void HighlightWindowEffect::finishHighlighting()
-- 
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