Compilation fix.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@24628 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/motif/settings.cpp

@@ -30,6 +30,8 @@
 #pragma message enable nosimpint
 #endif
 
+#include "wx/x11/privx.h"
+
 // To correctly read the resources from the database, we create a
 // sample widget. This has the application shell as the parent and
 // so will be destroyed when the applicaion is closed.