promote the 'using' methods to public. Also, fix a sef. fault for using with pointers, see using_pointers.i

git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk@5525 626c5289-ae23-0410-ae9c-e8d60b6d4f22

SWIG/Examples/test-suite/using_pointers.i

@@ -0,0 +1,17 @@
+%module using_pointers
+
+%inline %{
+  class Foo {
+  public:
+    int x;
+    virtual Foo* blah() { return this; }
+  };
+
+  class FooBar : public Foo {
+  public:
+    using Foo::blah;
+    using Foo::x;
+  };
+
+%}
+