Skip processing application for LDN if it does not have control holder

src/Ryujinx/UI/Windows/MainWindow.axaml.cs

@@ -171,6 +171,11 @@ private void ApplicationLibrary_LdnGameDataReceived(object sender, LdnGameDataRe
                 ViewModel.LdnData.Clear();
                 foreach (var application in ViewModel.Applications)
                 {
+                    if (!application.HasControlHolder)
+                    {
+                        continue;
+                    }
+
                     ref var controlHolder = ref application.ControlHolder.Value;
 
                     ViewModel.LdnData[application.IdString] =