Remove wx includes in x3d.h

plugins/3d/vrml/x3d.cpp

@@ -34,6 +34,7 @@
 #include <vector>
 #include <wx/tokenzr.h>
 #include <wx/wfstream.h>
+#include <wx/xml/xml.h>
 #include <iostream>
 
 #include "x3d.h"

plugins/3d/vrml/x3d.h

@@ -25,12 +25,12 @@
 #define S3D_X3D_H
 
 #include <map>
-#include <wx/string.h>
-#include <wx/xml/xml.h>
 
 
 class SCENEGRAPH;
 class SGNODE;
+class wxXmlNode;
+class wxString;
 
 class X3DPARSER
 {