From eb171a45923624b5742254c0f483eb2ae2873213 Mon Sep 17 00:00:00 2001
From: Vadim Zeitlin <vadim@wxwidgets.org>
Date: Fri, 5 Dec 2014 22:18:16 +0000
Subject: [PATCH] Don't dereference wxTheApp unconditionally when showing
 wxMessageDialog.

The application might not yet (or already) exist, don't crash in this case.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@78234 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
---
 src/msw/msgdlg.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/msw/msgdlg.cpp b/src/msw/msgdlg.cpp
index 1ad42ad427..ed3354f4fc 100644
--- a/src/msw/msgdlg.cpp
+++ b/src/msw/msgdlg.cpp
@@ -430,7 +430,7 @@ wxFont wxMessageDialog::GetMessageFont()
 
 int wxMessageDialog::ShowMessageBox()
 {
-    if ( !wxTheApp->GetTopWindow() )
+    if ( wxTheApp && !wxTheApp->GetTopWindow() )
     {
         // when the message box is shown from wxApp::OnInit() (i.e. before the
         // message loop is entered), this must be done or the next message box