message: ignore tests dependent on flann when flann module is absent
diff: @@ -558,6 +558,7 @@ TEST( Features2d_DMatch, read_write )
  ASSERT_NE( strstr(str.c_str(), "4.5"), (char*)0 );
  }
  +#ifdef HAVE_OPENCV_FLANN
  TEST( Features2d_FlannBasedMatcher, read_write )
  {
  static const char* ymlfile = "%YAML:1.0\n---\n"
  @@ -594,7 +595,7 @@ TEST( Features2d_FlannBasedMatcher, read_write )
  EXPECT_EQ(ymlfile, out);
  }
  -
  +#endif
  TEST(Features2d_DMatch, issue_11855)
  {
  