From 6e908f09dfc19be3cbbf38628c63c348c5172e53 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?S=C3=A9rgio=20Martins?= <sergio.martins@kdab.com>
Date: Mon, 22 Oct 2012 00:55:04 +0100
Subject: Don't crash if there's no m_image yet.
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Reproducible with:
    QBackingStore store( &window );
    store.beginPaint(QRect(0,0,500,500));

All other methods already have null pointer checks.

Change-Id: Ie278a263760900b58cf4a2ef286deb7f35d50cd0
Reviewed-by: Samuel Rødal <samuel.rodal@digia.com>
---
 src/plugins/platforms/xcb/qxcbbackingstore.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/plugins/platforms/xcb/qxcbbackingstore.cpp b/src/plugins/platforms/xcb/qxcbbackingstore.cpp
index 847fd67047..649469ab9d 100644
--- a/src/plugins/platforms/xcb/qxcbbackingstore.cpp
+++ b/src/plugins/platforms/xcb/qxcbbackingstore.cpp
@@ -262,11 +262,14 @@ QXcbBackingStore::~QXcbBackingStore()
 
 QPaintDevice *QXcbBackingStore::paintDevice()
 {
-    return m_image->image();
+    return m_image ? m_image->image() : 0;
 }
 
 void QXcbBackingStore::beginPaint(const QRegion &region)
 {
+    if (!m_image)
+        return;
+
     m_image->preparePaint(region);
 
 #if 0
-- 
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