fix: avoid 404 on asset language undefined

src/app/components/presentationals/language-selector/language-selector.presentational.ts

@@ -14,7 +14,10 @@ import {
   BehaviorSubject,
   Observable,
 } from "rxjs";
-import {ObservableUtil} from "solidify-frontend";
+import {
+  isNullOrUndefined,
+  ObservableUtil,
+} from "solidify-frontend";
 
 @Component({
   selector: "dlcm-language-selector",
@@ -53,7 +56,10 @@ export class LanguageSelectorPresentational extends SharedAbstractPresentational
     this._languageBS.next(language);
   }
 
-  getPathToImage(language: LanguagesEnum): string {
+  getPathToImage(language: LanguagesEnum): string | undefined {
+    if (isNullOrUndefined(language)) {
+      return undefined;
+    }
     return "assets/language-icons/" + language + ".svg";
   }