message: GStreamer backend: fixed memory leak and version check
diff: @@ -125,7 +125,7 @@ private:
  gst_init(NULL, NULL);
  guint major, minor, micro, nano;
  gst_version(&major, &minor, &micro, &nano);
  - if (GST_VERSION_MAJOR == major)
  + if (GST_VERSION_MAJOR != major)
  {
  CV_WARN("incompatible gstreamer version");
  }
  @@ -268,7 +268,6 @@ bool GStreamerCapture::grabFrame()
  sample = gst_app_sink_pull_sample(GST_APP_SINK(sink));
  if(!sample)
  return false;
  - gst_sample_ref(sample);
  #endif
  if (isPosFramesEmulated)
  