first round of debug/release merge: introduce wxDEBUG_LEVEL, for now defined as 1 if __WXDEBUG__ is defined, i.e. no real changes; don't use __WXDEBUG__ in the headers to keep debug and release builds ABI-compatible; add functions to customize or disable asserts handling

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@59711 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/x11/app.h

@@ -55,10 +55,6 @@ public:
     // Processes an X event.
     virtual bool ProcessXEvent(WXEvent* event);
 
-#ifdef __WXDEBUG__
-    virtual void OnAssert(const wxChar *file, int line, const wxChar* cond, const wxChar *msg);
-#endif // __WXDEBUG__
-
 public:
     // Implementation
     virtual bool Initialize(int& argc, wxChar **argv);