From c5dfe5a17650e35fcbc6c75151b03cdb18033cca Mon Sep 17 00:00:00 2001
From: Tatiana Meshkova <tanya.meshkova@gmail.com>
Date: Fri, 15 Mar 2013 00:56:04 -0700
Subject: [PATCH] Bug 851438 - crash [@ MozQWidget::showEvent] r=romaxa.
 DONTBUILD

---
 widget/qt/mozqwidget.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/widget/qt/mozqwidget.cpp b/widget/qt/mozqwidget.cpp
index d8e7a6b7e115..30aa32ccf9fd 100644
--- a/widget/qt/mozqwidget.cpp
+++ b/widget/qt/mozqwidget.cpp
@@ -414,7 +414,9 @@ void MozQWidget::hideEvent(QHideEvent* aEvent)
 
 void MozQWidget::showEvent(QShowEvent* aEvent)
 {
-    mReceiver->showEvent(aEvent);
+    if (mReceiver) {
+        mReceiver->showEvent(aEvent);
+    }
     QGraphicsWidget::showEvent(aEvent);
 }