Fixed warning

git-svn-id: svn+ssh://svn.code.sf.net/p/supertuxkart/code/main/trunk@4715 178a84e3-b1eb-0310-8ba1-8eac791a3b58

src/karts/controller/controller.hpp

@@ -41,7 +41,7 @@ protected:
 
 public:
                   Controller         (Kart *kart);
-                 ~Controller         () {};
+    virtual      ~Controller         () {};
     virtual void  reset              () {};
     virtual void  update             (float dt) {};
     virtual void  handleZipper       () {};