#include "charset.h"

but it should not be necessary "thanks to" the vlc_symbols.h kludge

modules/gui/wxwidgets/dialogs.cpp

@@ -32,6 +32,7 @@
 #include <vlc/vlc.h>
 #include <vlc/aout.h>
 #include <vlc/intf.h>
+#include "charset.h"
 
 #include "wxwidgets.h"
 

modules/gui/wxwidgets/interface.cpp

@@ -29,6 +29,7 @@
 #include <vlc/vout.h>
 #include <vlc/input.h>
 #include <vlc/intf.h>
+#include "charset.h"
 
 #include "wxwidgets.h"
 

modules/gui/wxwidgets/open.cpp

@@ -31,6 +31,7 @@
 #include <stdio.h>
 
 #include <vlc/vlc.h>
+#include "charset.h"
 
 #ifdef HAVE_LIBCDIO
 #include <cdio/cdio.h>