message: silence visual studio warning
diff: @@ -156,7 +156,7 @@ public:
  << colour_none() << std::endl;
  std::cout << "location : " << m_file << ":" << m_line << std::endl;
  this->impl();
  - } catch (const test_exception& e) {
  + } catch (const test_exception&) {
  m_has_failed = true;
  } catch (const std::exception& e) {
  exception_caught(e.what());
  