From 00c784a4d13021bcdc0f75fcd505ca984c0719e9 Mon Sep 17 00:00:00 2001
From: Vadim Zeitlin <vadim@wxwidgets.org>
Date: Tue, 20 Dec 2011 15:39:42 +0000
Subject: [PATCH] Fix crash in wxRegion in wxOSX/Carbon.

Apparently some code expects to be able to call wxRegion::GetWXHRGN() even on
an invalid wxRegion. Return NULL in this case instead of crashing.

This fixes crash on startup of the widgets sample.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@70064 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
---
 src/osx/carbon/region.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/osx/carbon/region.cpp b/src/osx/carbon/region.cpp
index 83a2e15e12..8db684def8 100644
--- a/src/osx/carbon/region.cpp
+++ b/src/osx/carbon/region.cpp
@@ -309,6 +309,9 @@ bool wxRegion::IsEmpty() const
 
 WXHRGN wxRegion::GetWXHRGN() const
 {
+    if ( !m_refData )
+        return NULL;
+
     return M_REGION ;
 }