aui: allow m_frame to be null in wxFrameManager

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@42807 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/aui/auibook.h

@@ -260,6 +260,8 @@ public:
                  const wxSize& size = wxDefaultSize,
                  long style = 0);
 
+    ~wxAuiTabCtrl();
+    
 protected:
 
     void OnPaint(wxPaintEvent& evt);

src/aui/auibook.cpp

@@ -952,6 +952,9 @@ wxAuiTabCtrl::wxAuiTabCtrl(wxWindow* parent,
     m_hover_button = NULL;
 }
 
+wxAuiTabCtrl::~wxAuiTabCtrl()
+{
+}
 
 void wxAuiTabCtrl::OnPaint(wxPaintEvent&)
 {

src/aui/framemanager.cpp

@@ -486,6 +486,7 @@ wxFrameManager::wxFrameManager(wxWindow* managed_wnd, unsigned int flags)
     m_hint_wnd = NULL;
     m_flags = flags;
     m_skipping = false;
+    m_frame = NULL;
     
     if (managed_wnd)
     {
@@ -741,7 +742,10 @@ void wxFrameManager::SetManagedWindow(wxWindow* wnd)
 // will result in a crash upon program exit
 void wxFrameManager::UnInit()
 {
-    m_frame->RemoveEventHandler(this);
+    if (m_frame)
+    {
+        m_frame->RemoveEventHandler(this);
+    }
 }
 
 // GetManagedWindow() returns the window pointer being managed