[NUI] Fix crash when View.BackgroundImage is set

Previously, View.BackgroundImage is set, PropertyValue constructor can
be called with null pointer and this causes crash.

Now, it has been fixed not to pass null pointer to PropertyValue
constructor.

diff --git a/src/Tizen.NUI/src/public/BaseComponents/ViewBindableProperty.cs b/src/Tizen.NUI/src/public/BaseComponents/ViewBindableProperty.cs
index 388a352..46e4023 100755 (executable)
--- a/src/Tizen.NUI/src/public/BaseComponents/ViewBindableProperty.cs
+++ b/src/Tizen.NUI/src/public/BaseComponents/ViewBindableProperty.cs
@@ -2399,7 +2399,7 @@ namespace Tizen.NUI.BaseComponents
             var borderlineOffset = new PropertyValue(backgroundExtraData.BorderlineOffset);
             var synchronousLoading = new PropertyValue(backgroundImageSynchronousLoading);
             var npatchType = new PropertyValue((int)Visual.Type.NPatch);
-            var border = new PropertyValue(backgroundExtraData.BackgroundImageBorder);
+            var border = (backgroundExtraData.BackgroundImageBorder != null) ? new PropertyValue(backgroundExtraData.BackgroundImageBorder) : null;
             var imageType = new PropertyValue((int)Visual.Type.Image);
 
             map.Add(ImageVisualProperty.URL, url)