update swig on windows

winx64/bin/swigwin-4.0.0/Examples/lua/import/bar.h

@@ -0,0 +1,21 @@
+#include "base.h"
+
+class Bar : public Base {
+ public:
+  Bar() { }
+  ~Bar() { }
+  virtual const char * A() const { 
+    return "Bar::A";
+  }
+  const char * B() const {
+    return "Bar::B";
+  }
+  virtual Base *toBase() {
+    return static_cast<Base *>(this);
+  }
+  static Bar *fromBase(Base *b) {
+    return dynamic_cast<Bar *>(b);
+  }
+};
+
+