Added code to set m_isBeingDeleted as per wxGTK

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@3237 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/motif/dialog.cpp

@@ -258,6 +258,8 @@ void wxDialog::SetModal(bool flag)
 
 wxDialog::~wxDialog()
 {
+    m_isBeingDeleted = TRUE;
+    
     if (m_mainWidget)
       XtRemoveEventHandler((Widget) m_mainWidget, ExposureMask, FALSE,
           wxUniversalRepaintProc, (XtPointer) this);

src/motif/frame.cpp

@@ -300,6 +300,8 @@ bool wxFrame::Create(wxWindow *parent,
 
 wxFrame::~wxFrame()
 {
+    m_isBeingDeleted = TRUE;
+    
     if (m_clientArea)
       XtRemoveEventHandler((Widget) m_clientArea, ExposureMask, FALSE,
           wxUniversalRepaintProc, (XtPointer) this);

src/motif/window.cpp

@@ -183,6 +183,7 @@ void wxWindow::Init()
     m_winCaptured = FALSE;
 
     m_isShown = TRUE;
+    m_isBeingDeleted = FALSE;
     
     m_hScrollBar =
     m_vScrollBar =
@@ -360,6 +361,8 @@ bool wxWindow::Create(wxWindow *parent, wxWindowID id,
 // Destructor
 wxWindow::~wxWindow()
 {
+    m_isBeingDeleted = TRUE;
+    
     // Motif-specific actions first
     WXWidget wMain = GetMainWidget();
     if ( wMain )