From 718c916c936b79a9f1cc9cba3ee38b149b503b9c Mon Sep 17 00:00:00 2001
From: Artur Wieczorek <artwik@wp.pl>
Date: Wed, 4 Oct 2017 16:06:02 +0200
Subject: [PATCH] Don't overwrite notification flags while setting a title for
 wxProgressDialog (wxMSW)

In wxProgressDialog::SetTitle(), wxSPDD_TITLE_CHANGED flag signaling a request to update a title should be added to the flags already being set and signaling another data waiting for the update.

Closes #17966.
---
 src/msw/progdlg.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/msw/progdlg.cpp b/src/msw/progdlg.cpp
index f44c17ba68..486a1cc063 100644
--- a/src/msw/progdlg.cpp
+++ b/src/msw/progdlg.cpp
@@ -626,7 +626,7 @@ void wxProgressDialog::SetTitle(const wxString& title)
         {
             wxCriticalSectionLocker locker(m_sharedData->m_cs);
             m_sharedData->m_title = title;
-            m_sharedData->m_notifications = wxSPDD_TITLE_CHANGED;
+            m_sharedData->m_notifications |= wxSPDD_TITLE_CHANGED;
         }
     }
 #endif // wxHAS_MSW_TASKDIALOG