Fix ribbon sample compilation after r71642.

Add a missing header with declaration of wxMessageBox() for PCH-less
compilation.

Closes #14376.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@71646 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

diff --git a/samples/ribbon/ribbondemo.cpp b/samples/ribbon/ribbondemo.cpp
index ffd13589ef1751f28c7160ec8e499efde627690c..65a3b95b2f2667deaad9fbe7171807a9b7a81111 100644 (file)
--- a/samples/ribbon/ribbondemo.cpp
+++ b/samples/ribbon/ribbondemo.cpp
@@ -24,6 +24,7 @@
 #include "wx/ribbon/toolbar.h"
 #include "wx/sizer.h"
 #include "wx/menu.h"
+#include "wx/msgdlg.h"
 #include "wx/dcbuffer.h"
 #include "wx/colordlg.h"
 #include "wx/artprov.h"