message: Only pull value if there is one
diff: @@ -13,10 +13,11 @@ void SstParamParser::ParseParams(IO &io, struct _SstParams &Params)
  {
  auto lf_SetBoolParameter = [&](const std::string key, int &parameter) {
  auto itKey = io.m_Parameters.find(key);
  - std::string value = itKey->second;
  - std::transform(value.begin(), value.end(), value.begin(), ::tolower);
  if (itKey != io.m_Parameters.end())
  {
  + std::string value = itKey->second;
  + std::transform(value.begin(), value.end(), value.begin(),
  + ::tolower);
  if (value == "yes" || value == "true" || value == "on")
  {
  parameter = 1;
  