From 99add01e76657ab7bc09d99c970b3ee08a0c9013 Mon Sep 17 00:00:00 2001
From: Cory Fields <theuni-nospam-@xbmc.org>
Date: Tue, 4 Jun 2013 23:44:53 -0400
Subject: [PATCH] osx: fix bitcoin-qt startup crash when clicking dock icon

Crash probably introduced by 4d17a1b0.
Inialize the window to NULL and verify it before use.
---
 src/qt/macdockiconhandler.mm | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/qt/macdockiconhandler.mm b/src/qt/macdockiconhandler.mm
index 53b49c42e6b..8f826941b28 100644
--- a/src/qt/macdockiconhandler.mm
+++ b/src/qt/macdockiconhandler.mm
@@ -51,6 +51,7 @@ MacDockIconHandler::MacDockIconHandler() : QObject()
     this->m_dockIconClickEventHandler = [[DockIconClickEventHandler alloc] initWithDockIconHandler:this];
     this->m_dummyWidget = new QWidget();
     this->m_dockMenu = new QMenu(this->m_dummyWidget);
+    this->setMainWindow(NULL);
 
     [pool release];
 }
@@ -114,8 +115,11 @@ MacDockIconHandler *MacDockIconHandler::instance()
 
 void MacDockIconHandler::handleDockIconClickEvent()
 {
-    this->mainWindow->activateWindow();
-    this->mainWindow->show();
+    if (this->mainWindow)
+    {
+        this->mainWindow->activateWindow();
+        this->mainWindow->show();
+    }
 
     emit this->dockIconClicked();
 }