minimalistic build fixes (mostly #if wxUSE_something)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@6316 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/gtk/notebook.cpp

@@ -651,6 +651,8 @@ wxNotebookPage *wxNotebook::GetPage( int page ) const
         return nb_page->m_client;
 }
 
+#if wxUSE_CONSTRAINTS
+
 // override these 2 functions to do nothing: everything is done in OnSize
 void wxNotebook::SetConstraintSizes( bool WXUNUSED(recurse) )
 {
@@ -663,6 +665,8 @@ bool wxNotebook::DoPhase( int WXUNUSED(nPhase) )
     return TRUE;
 }
 
+#endif
+
 void wxNotebook::ApplyWidgetStyle()
 {
     // TODO, font for labels etc