message: fix nvs erase
diff: @@ -1669,7 +1669,7 @@ bool WiFiManager::erase(){
  bool WiFiManager::erase(bool opt){
  DEBUG_WM("Erasing");
  - #if defined(ESP32) && (defined(WM_ERASE_NVS) || defined(ESP_NVS_H))
  + #if defined(ESP32) && (defined(WM_ERASE_NVS) || defined(nvs_flash_h))
  // if opt true, do nvs erase
  if(opt){
  DEBUG_WM("Erasing NVS");
  