Make wxSpinCtrlGeneric usable as wxDVC editor control.

wxDVC installs temporary event handler that watches for focus changes
and some key events. Make wxSpinCtrlGeneric look like a native
wxControl in this respect even though it's actually a composite control.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@67665 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/generic/spinctlg.h

@@ -92,7 +92,7 @@ public:
 
     // forwarded events from children windows
     void OnSpinButton(wxSpinEvent& event);
-    void OnTextLostFocus();
+    void OnTextLostFocus(wxFocusEvent& event);
     void OnTextChar(wxKeyEvent& event);
 
     // this window itself is used only as a container for its sub windows so it
@@ -148,6 +148,8 @@ protected:
 private:
     // common part of all ctors
     void Init();
+
+    DECLARE_EVENT_TABLE()
 };
 
 #else // !wxUSE_SPINBTN