Merge pull request #1314 from snrnats/dev

Crash in getter HamburgerMenu.OpenPaneLength with default value

Author: IbraheemOsama

Microsoft.Toolkit.Uwp.UI.Controls/HamburgerMenu/HamburgerMenu.Properties.cs

@@ -25,7 +25,7 @@ public partial class HamburgerMenu
         /// <summary>
         /// Identifies the <see cref="OpenPaneLength"/> dependency property.
         /// </summary>
-        public static readonly DependencyProperty OpenPaneLengthProperty = DependencyProperty.Register(nameof(OpenPaneLength), typeof(double), typeof(HamburgerMenu), new PropertyMetadata(320));
+        public static readonly DependencyProperty OpenPaneLengthProperty = DependencyProperty.Register(nameof(OpenPaneLength), typeof(double), typeof(HamburgerMenu), new PropertyMetadata(320.0));
 
         /// <summary>
         /// Identifies the <see cref="PanePlacement"/> dependency property.