Update TouchEffect.shared.cs (#1767)

Author: AndreiMisiukevich

src/CommunityToolkit/Xamarin.CommunityToolkit/Effects/Touch/TouchEffect.shared.cs

@@ -1169,6 +1169,9 @@ internal void RaiseHoverStatusChanged()
 		internal void RaiseCompleted()
 		{
 			var element = Element;
+			if (element == null)
+				return;
+
 			var parameter = CommandParameter;
 			Command?.Execute(parameter);
 			weakEventManager.RaiseEvent(element, new TouchCompletedEventArgs(parameter), nameof(Completed));
@@ -1177,6 +1180,9 @@ internal void RaiseCompleted()
 		internal void RaiseLongPressCompleted()
 		{
 			var element = Element;
+			if (element == null)
+				return;
+
 			var parameter = LongPressCommandParameter ?? CommandParameter;
 			LongPressCommand?.Execute(parameter);
 			weakEventManager.RaiseEvent(element, new LongPressCompletedEventArgs(parameter), nameof(LongPressCompleted));
@@ -1230,4 +1236,4 @@ void OnLayoutChildAdded(object? sender, ElementEventArgs e)
 			view.InputTransparent = effect?.Element == null || !effect.IsAvailable;
 		}
 	}
-}
+}