From 99362fb7f25a88829c2d824ebfe6da61d4d7b35f Mon Sep 17 00:00:00 2001
From: Friedemann Kleint <Friedemann.Kleint@digia.com>
Date: Fri, 30 Aug 2013 12:08:47 +0200
Subject: [PATCH] Windows XP file dialog: Fix appending the selected filter
 suffix.

The mechanism is triggered by always setting lpstrDefExt,

Task-number: QTBUG-33156

Change-Id: Ib3a49410a1ad78fb433a4e0803a0751ec8c2a51e
Reviewed-by: Joerg Bornemann <joerg.bornemann@digia.com>
---
 src/plugins/platforms/windows/qwindowsdialoghelpers.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/plugins/platforms/windows/qwindowsdialoghelpers.cpp b/src/plugins/platforms/windows/qwindowsdialoghelpers.cpp
index 27a7044868..9a7d03c0c2 100644
--- a/src/plugins/platforms/windows/qwindowsdialoghelpers.cpp
+++ b/src/plugins/platforms/windows/qwindowsdialoghelpers.cpp
@@ -1818,8 +1818,8 @@ void QWindowsXpNativeFileDialog::populateOpenFileName(OPENFILENAME *ofn, HWND ow
         QString defaultSuffix = m_options->defaultSuffix();
         if (defaultSuffix.startsWith(QLatin1Char('.')))
             defaultSuffix.remove(0, 1);
-        if (!defaultSuffix.isEmpty())
-            ofn->lpstrDefExt = qStringToWCharArray(defaultSuffix);
+        // QTBUG-33156, also create empty strings to trigger the appending mechanism.
+        ofn->lpstrDefExt = qStringToWCharArray(defaultSuffix);
     }
     // Flags.
     ofn->Flags = (OFN_NOCHANGEDIR | OFN_HIDEREADONLY | OFN_EXPLORER | OFN_PATHMUSTEXIST);