guard against erases during tlw window destruction

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@34598 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

diff --git a/src/mac/carbon/window.cpp b/src/mac/carbon/window.cpp
index 4bd0ab12be9e560e451039aa7224f2553f9defb7..bbd59ffe8c589f8b84f31888764e222e1cb737e3 100644 (file)
--- a/src/mac/carbon/window.cpp
+++ b/src/mac/carbon/window.cpp
@@ -2169,6 +2169,8 @@ void wxWindowMac::WarpPointer (int x_pos, int y_pos)
 
 void wxWindowMac::OnEraseBackground(wxEraseEvent& event)
 {
+       if ( MacGetTopLevelWindow() == NULL )
+               return ;
 #if TARGET_API_MAC_OSX
     if ( MacGetTopLevelWindow()->MacUsesCompositing() && (m_macBackgroundBrush.Ok() == false || m_macBackgroundBrush.GetStyle() == wxTRANSPARENT ) )
     {