[NUI] add null check in collectionview
authorEverLEEst(SangHyeon Lee) <sh10233.lee@samsung.com>
Tue, 9 Nov 2021 06:39:15 +0000 (15:39 +0900)
committerdongsug-song <35130733+dongsug-song@users.noreply.github.com>
Thu, 11 Nov 2021 06:54:20 +0000 (15:54 +0900)
commit9569e1b62d31b0c534cc3d050155f5b70baa00f1
treeb6f94f7cb0c19f23b68ace0de6255dd2d751e48e
parente62db1769f32f7fa214b7def490cebf7e195fd79
[NUI] add null check in collectionview

null value is abnormal in collectionview,
but adding null value check for code management.
src/Tizen.NUI.Components/Controls/RecyclerView/CollectionView.cs
src/Tizen.NUI.Components/Controls/RecyclerView/Item/RecyclerViewItem.Internal.cs
src/Tizen.NUI.Components/Controls/RecyclerView/Item/RecyclerViewItem.cs