From 68f5137da595dd8e1623568ac7ccd71c0f0701fb Mon Sep 17 00:00:00 2001
From: Martin Petersson <martin.petersson@nokia.com>
Date: Thu, 10 Mar 2011 15:07:15 +0100
Subject: Mac: Center the Window title on Cocoa.

Task-number: QTBUG-13593
Reviewed-by: Richard Moe Gustavsen
---
 src/gui/kernel/qwidget_mac.mm | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/gui/kernel/qwidget_mac.mm b/src/gui/kernel/qwidget_mac.mm
index 9481a85..a2e868d 100644
--- a/src/gui/kernel/qwidget_mac.mm
+++ b/src/gui/kernel/qwidget_mac.mm
@@ -3214,6 +3214,8 @@ void QWidgetPrivate::setWindowIcon_sys(bool forceReset)
             ReleaseIconRef(previousIcon);
 #else
         QMacCocoaAutoReleasePool pool;
+        if (icon.isNull())
+            return;
         NSButton *iconButton = [qt_mac_window_for(q) standardWindowButton:NSWindowDocumentIconButton];
         if (iconButton == nil) {
             QCFString string(q->windowTitle());
-- 
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