message: ts: don't pass NULL for std::string() constructor
diff: @@ -921,6 +921,14 @@ inline static void recordPropertyVerbose(const std::string & property,
  }
  }
  +inline static void recordPropertyVerbose(const std::string& property, const std::string& msg,
  + const char* value, const char* build_value = NULL)
  +{
  + return recordPropertyVerbose(property, msg,
  + value ? std::string(value) : std::string(),
  + build_value ? std::string(build_value) : std::string());
  +}
  +
  #ifdef _DEBUG
  #define CV_TEST_BUILD_CONFIG "Debug"
  #else
  