fix warnings

git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk@6686 626c5289-ae23-0410-ae9c-e8d60b6d4f22

SWIG/Examples/test-suite/multiple_inheritance.i

@@ -18,18 +18,26 @@ It tests basic multiple inheritance */
 %inline %{
 
 class Bar {
-  public:
+public:
-    virtual int bar() { return 1; }
+  virtual ~Bar()
+  {
+  }
+  
+  virtual int bar() { return 1; }
 };
 
 class Foo {
-  public:
+public:
-    virtual int foo() { return 2; }
+  virtual ~Foo()
+  {
+  }
+
+  virtual int foo() { return 2; }
 };
 
 class FooBar : public Foo, public Bar {
-  public:
+public:
-    virtual int fooBar() { return 3; }
+  virtual int fooBar() { return 3; }
 };
 
 %}