fdo#73549 do not attempt to resolve an empty locale

... to match installed UI locales

Change-Id: If0ad0fde392bc5ea3cf454f4858330f5e93a6666

desktop/source/app/langselect.cxx

@@ -53,6 +53,9 @@ OUString foundLocale;
 OUString getInstalledLocale(
     css::uno::Sequence<OUString> const & installed, OUString const & locale)
 {
+    if (locale.isEmpty())
+        return OUString();  // do not attempt to resolve anything
+
     for (sal_Int32 i = 0; i != installed.getLength(); ++i) {
         if (installed[i] == locale) {
             return installed[i];