message: fix typo in cpp test
diff: @@ -76,7 +76,7 @@ int main (int argc, char *argv[])
  std::cout << "preprocessing data" << std::endl;
  dh->preprocess_data (data_buf, data_count);
  }
  - catch (const BrainFlowExcpetion &err)
  + catch (const BrainFlowException &err)
  {
  std::cout << err.what () << std::endl;
  res = err.get_exit_code ();
  