message: fix(@nguniversal/common): handle `ngDevMode` correctly
diff: @@ -34,7 +34,7 @@ export class SSRStylesHost extends SharedStylesHost implements OnDestroy {
  private _addStyle(style: string): void {
  const element = this._styleNodesInDOM?.get(style);
  if (element) {
  - if (typeof ngDevMode !== undefined && ngDevMode) {
  + if (typeof ngDevMode !== 'undefined' && ngDevMode) {
  element.setAttribute('_ng-style-re-used', '');
  }
  