1. some patches from Janos Vegh to docview template detection

2. fixed reentrancy bug in wxGetTranslation/wxLogError resulting in infinite
   number of messageboxes
3. wxMenuItem::GetLabelFromText("&Foo") now returns "Foo", not "&Foo" in GTK
   as well
4. test for update region being NULL in wxPaintDC


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@6655 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/docview.h

@@ -333,6 +333,10 @@ public:
     // Extend event processing to search the view's event table
     virtual bool ProcessEvent(wxEvent& event);
 
+    // called when file format detection didn't work, can be overridden to do
+    // something in this case
+    virtual void OnOpenFileFailure() { wxFAIL_MSG(_T("file format mismatch")); }
+
     virtual wxDocument *CreateDocument(const wxString& path, long flags = 0);
     virtual wxView *CreateView(wxDocument *doc, long flags = 0);
     virtual void DeleteTemplate(wxDocTemplate *temp, long flags = 0);