`WpfHelper.FindChildren`: Pass `forceUsingTheVisualTreeHelper` to recursive calls...

fixes #5921

diff --git a/Xamarin.Forms.Platform.WPF/Helpers/TreeHelper.cs b/Xamarin.Forms.Platform.WPF/Helpers/TreeHelper.cs
index df9a003..31acf9e 100644 (file)
--- a/Xamarin.Forms.Platform.WPF/Helpers/TreeHelper.cs
+++ b/Xamarin.Forms.Platform.WPF/Helpers/TreeHelper.cs
@@ -146,7 +146,7 @@ namespace Xamarin.Forms.Platform.WPF.Helpers
                                        }
 
                                        //recurse tree
-                                       foreach (T descendant in FindChildren<T>(child))
+                                       foreach (T descendant in FindChildren<T>(child, forceUsingTheVisualTreeHelper))
                                        {
                                                yield return descendant;
                                        }