compilation fix for wxUSE_CONSTRAINTS==0

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@18726 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/msw/notebook.cpp

@@ -603,6 +603,8 @@ void wxNotebook::OnNavigationKey(wxNavigationKeyEvent& event)
 // wxNotebook base class virtuals
 // ----------------------------------------------------------------------------
 
+#if wxUSE_CONSTRAINTS
+
 // override these 2 functions to do nothing: everything is done in OnSize
 
 void wxNotebook::SetConstraintSizes(bool WXUNUSED(recurse))
@@ -616,6 +618,8 @@ bool wxNotebook::DoPhase(int WXUNUSED(nPhase))
   return TRUE;
 }
 
+#endif // wxUSE_CONSTRAINTS
+
 // ----------------------------------------------------------------------------
 // wxNotebook Windows message handlers
 // ----------------------------------------------------------------------------