Fix: Ignore incorrect dataset labels instead of causing seg-fault error.

AlexeyAB

2018-05-28 6fd90762c5d1c322eafefc8fd21fc6d750853d21

 src/http_stream.cpp

@@ -208,7 +208,7 @@
      cap = (CvCapture*)new cv::VideoCapture(path);
   }
   catch (...) {
      std::cout << " Error: Web-camera " << path << " can't be opened! \n";
      std::cout << " Error: video-stream " << path << " can't be opened! \n";
   }
   return cap;
}