check that we don't try to compile in GUI mode

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@10840 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

samples/console/console.cpp

@@ -17,6 +17,12 @@
 // headers
 // ----------------------------------------------------------------------------
 
+#include <wx/defs.h>
+
+#if wxUSE_GUI
+    #error "This sample can't be compiled in GUI mode."
+#endif // wxUSE_GUI
+
 #include <stdio.h>
 
 #include <wx/string.h>