message: fix nvs erase log
diff: @@ -1807,10 +1807,11 @@ bool WiFiManager::erase(bool opt){
  if(opt){
  DEBUG_WM("Erasing NVS");
  int err;
  + esp_err_t err;
  err = nvs_flash_init();
  - DEBUG_WM(DEBUG_VERBOSE,"nvs_flash_init: ",err==ESP_OK ? (String)err : "Success");
  + DEBUG_WM(DEBUG_VERBOSE,"nvs_flash_init: ",err!=ESP_OK ? (String)err : "Success");
  err = nvs_flash_erase();
  - DEBUG_WM(DEBUG_VERBOSE,"nvs_flash_erase: ", err==ESP_OK ? (String)err : "Success");
  + DEBUG_WM(DEBUG_VERBOSE,"nvs_flash_erase: ", err!=ESP_OK ? (String)err : "Success");
  return err == ESP_OK;
  }
  #else
  