Fixed issue with ScaleX error on Android 9 and 11

#407

Author: Hein Jøsang

Rg.Plugins.Popup/Animations/FadeAnimation.cs

@@ -54,6 +54,8 @@ public override Task Appearing(View content, PopupPage page)
         public override Task Disappearing(View content, PopupPage page)
         {
             _defaultOpacity = page.Opacity;
+            if (double.IsNaN(_defaultOpacity))
+                _defaultOpacity = 1;
 
             if (HasBackgroundAnimation)
             {

Rg.Plugins.Popup/Animations/ScaleAnimation.cs

@@ -156,6 +156,8 @@ private void UpdateDefaultProperties(View content)
         {
             _defaultScale = content.Scale;
             _defaultOpacity = content.Opacity;
+            if (double.IsNaN(_defaultOpacity))
+                _defaultOpacity = 1;
             _defaultTranslationX = content.TranslationX;
             _defaultTranslationY = content.TranslationY;
         }