Fix wxStandardDialogLayoutAdapter compilation with wxUSE_BUTTON==0.

This class probably should not be compiled in at all in the minimal build but
in the meanwhile just add #if checks around its button-related parts.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@66087 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/dialog.h

@@ -317,6 +317,7 @@ public:
     // Create the scrolled window
     virtual wxScrolledWindow* CreateScrolledWindow(wxWindow* parent);
 
+#if wxUSE_BUTTON
     // Find a standard or horizontal box sizer
     virtual wxSizer* FindButtonSizer(bool stdButtonSizer, wxDialog* dialog, wxSizer* sizer, int& retBorder, int accumlatedBorder = 0);
 
@@ -328,6 +329,7 @@ public:
 
     // Find 'loose' main buttons in the existing layout and add them to the standard dialog sizer
     virtual bool FindLooseButtons(wxDialog* dialog, wxStdDialogButtonSizer* buttonSizer, wxSizer* sizer, int& count);
+#endif // wxUSE_BUTTON
 
     // Reparent the controls to the scrolled window, except those in buttonSizer
     virtual void ReparentControls(wxWindow* parent, wxWindow* reparentTo, wxSizer* buttonSizer = NULL);