fix bug #1292926

git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk@7698 626c5289-ae23-0410-ae9c-e8d60b6d4f22

SWIG/Examples/test-suite/virtual_derivation.i

@@ -51,4 +51,17 @@
     // declaration:
     // using A::get_a;
   };
+
+
+
+
+  class IndexReader{
+  public:
+    virtual void norms() = 0;
+  };
+
+  class MultiReader : public IndexReader {
+  protected:
+    MultiReader();
+  };
 %}