From 970766d4686af34a8af67e6bc36500a273499f53 Mon Sep 17 00:00:00 2001
From: "Aaron J. Seigo" <aseigo@kde.org>
Date: Wed, 24 Jun 2009 21:53:18 +0000
Subject: [PATCH] be careful with the to/from

svn path=/trunk/KDE/kdelibs/; revision=986690
---
 paintutils.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/paintutils.cpp b/paintutils.cpp
index 72c538130..e74a75c2b 100644
--- a/paintutils.cpp
+++ b/paintutils.cpp
@@ -135,6 +135,10 @@ QPainterPath roundedRectangle(const QRectF &rect, qreal radius)
 
 QPixmap transition(const QPixmap &from, const QPixmap &to, qreal amount)
 {
+    if (from.isNull() || to.isNull()) {
+        return from;
+    }
+
     int value = int(0xff * amount);
 
     if (value == 0) {