output: #fixed code
                                  @Test
      public void testGetMovieChangesList() throws MovieDbException {
          LOG.info("getMovieChangesList");
          List<ChangeListItem> result = instance.getChangeList(MethodBase.MOVIE, null, null, null);
          assertFalse("No movie changes.", result.isEmpty());
      }
input: #vulnerable code 
                                  @Test
      public void testGetMovieChangesList() throws MovieDbException {
          LOG.info("getMovieChangesList");
          TmdbResultsList<ChangedMedia> result = instance.getChangeList(MethodBase.MOVIE, null, null, null);
          assertFalse("No movie changes.", result.getResults().isEmpty());
      } 
                              #location 4 
                              #vulnerability type NULL_DEREFERENCE