Fix NPE

Author: Isira-Seneviratne

app/src/main/java/org/schabi/newpipe/ui/components/items/ItemList.kt

@@ -97,7 +97,7 @@ fun ItemList(
                 }
 
                 items(items.itemCount) {
-                    val item = items[it]!!
+                    val item = items[it]
                     val isSelected = selectedStream == item
 
                     // TODO: Implement playlist and channel grid items.

app/src/main/java/org/schabi/newpipe/ui/screens/HistoryScreen.kt

@@ -57,7 +57,9 @@ fun HistoryScreen(viewModel: HistoryViewModel = viewModel()) {
     val context = LocalContext.current
     val sortKey by viewModel.sortKey.collectAsStateWithLifecycle()
     val historyItems = viewModel.historyItems.collectAsLazyPagingItems()
-    val queue = SinglePlayQueue(historyItems.itemSnapshotList.map { it!!.toStreamInfoItem() }, 0)
+
+    val streams = historyItems.itemSnapshotList.mapNotNull { it?.toStreamInfoItem() }
+    val queue = SinglePlayQueue(streams, 0)
     val onClickBackground = {
         NavigationHelper.playOnBackgroundPlayer(context, queue, false)
     }