Fixed potential memory leak :-(

src/app/List.h

@@ -228,7 +228,10 @@ public:
     }
     int contains(T value)
     {
-        return contains(new T(value));
+        T *obj = new T(value);
+        int result = contains(obj); 
+        delete obj;
+        return result;
     }
     unsigned int count()
     {