Test to avoid crashes in some circumstances

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_8_BRANCH@48303 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
2007-08-21 16:48:32 +00:00
parent e88f2e9e59
commit 97e7beedd4
1 changed files with 3 additions and 1 deletions
--- a/src/mac/carbon/window.cpp
+++ b/src/mac/carbon/window.cpp
@@ -2887,7 +2887,9 @@ void wxWindowMac::ClearBackground()
 void wxWindowMac::Update()
 {
 #if TARGET_API_MAC_OSX
-    MacGetTopLevelWindow()->MacPerformUpdates() ;
+    wxTopLevelWindowMac* top = MacGetTopLevelWindow();
+    if (top)
+        top->MacPerformUpdates() ;
 #else
    ::Draw1Control( m_peer->GetControlRef() ) ;
 #endif