change payloads param to be non-null

app/src/main/java/com/keylesspalace/tusky/adapter/FollowRequestViewHolder.kt

@@ -46,7 +46,7 @@ class FollowRequestViewHolder(
 
     override fun bind(
         viewData: NotificationViewData.Concrete,
-        payloads: List<*>?,
+        payloads: List<*>,
         statusDisplayOptions: StatusDisplayOptions
     ) {
         setupWithAccount(

app/src/main/java/com/keylesspalace/tusky/components/notifications/FollowViewHolder.kt

@@ -33,7 +33,7 @@ class FollowViewHolder(
 
     override fun bind(
         viewData: NotificationViewData.Concrete,
-        payloads: List<*>?,
+        payloads: List<*>,
         statusDisplayOptions: StatusDisplayOptions
     ) {
         val context = itemView.context

app/src/main/java/com/keylesspalace/tusky/components/notifications/NotificationsPagingAdapter.kt

@@ -44,7 +44,7 @@ interface NotificationActionListener {
 interface NotificationsViewHolder {
     fun bind(
         viewData: NotificationViewData.Concrete,
-        payloads: List<*>?,
+        payloads: List<*>,
         statusDisplayOptions: StatusDisplayOptions
     )
 }
@@ -133,7 +133,7 @@ class NotificationsPagingAdapter(
     }
 
     override fun onBindViewHolder(viewHolder: RecyclerView.ViewHolder, position: Int) {
-        bindViewHolder(viewHolder, position, null)
+        bindViewHolder(viewHolder, position, emptyList())
     }
 
     override fun onBindViewHolder(
@@ -144,7 +144,7 @@ class NotificationsPagingAdapter(
         bindViewHolder(viewHolder, position, payloads)
     }
 
-    private fun bindViewHolder(viewHolder: RecyclerView.ViewHolder, position: Int, payloads: List<Any>?) {
+    private fun bindViewHolder(viewHolder: RecyclerView.ViewHolder, position: Int, payloads: List<Any>) {
         getItem(position)?.let { notification ->
             when (notification) {
                 is NotificationViewData.Concrete ->

app/src/main/java/com/keylesspalace/tusky/components/notifications/ReportNotificationViewHolder.kt

@@ -35,7 +35,7 @@ class ReportNotificationViewHolder(
 
     override fun bind(
         viewData: NotificationViewData.Concrete,
-        payloads: List<*>?,
+        payloads: List<*>,
         statusDisplayOptions: StatusDisplayOptions
     ) {
         val report = viewData.report!!

app/src/main/java/com/keylesspalace/tusky/components/notifications/StatusNotificationViewHolder.kt

@@ -70,11 +70,11 @@ internal class StatusNotificationViewHolder(
 
     override fun bind(
         viewData: NotificationViewData.Concrete,
-        payloads: List<*>?,
+        payloads: List<*>,
         statusDisplayOptions: StatusDisplayOptions
     ) {
         val statusViewData = viewData.statusViewData
-        if (payloads.isNullOrEmpty()) {
+        if (payloads.isEmpty()) {
             /* in some very rare cases servers sends null status even though they should not */
             if (statusViewData == null) {
                 showNotificationContent(false)

app/src/main/java/com/keylesspalace/tusky/components/notifications/StatusViewHolder.kt

@@ -32,7 +32,7 @@ internal class StatusViewHolder(
 
     override fun bind(
         viewData: NotificationViewData.Concrete,
-        payloads: List<*>?,
+        payloads: List<*>,
         statusDisplayOptions: StatusDisplayOptions
     ) {
         val statusViewData = viewData.statusViewData
@@ -40,14 +40,14 @@ internal class StatusViewHolder(
             /* in some very rare cases servers sends null status even though they should not */
             showStatusContent(false)
         } else {
-            if (payloads.isNullOrEmpty()) {
+            if (payloads.isEmpty()) {
                 showStatusContent(true)
             }
             setupWithStatus(
                 statusViewData,
                 statusActionListener,
                 statusDisplayOptions,
-                payloads?.firstOrNull()
+                payloads.firstOrNull()
             )
         }
         if (viewData.type == Notification.Type.POLL) {

app/src/main/java/com/keylesspalace/tusky/components/notifications/UnknownNotificationViewHolder.kt

@@ -28,7 +28,7 @@ internal class UnknownNotificationViewHolder(
 
     override fun bind(
         viewData: NotificationViewData.Concrete,
-        payloads: List<*>?,
+        payloads: List<*>,
         statusDisplayOptions: StatusDisplayOptions
     ) {
         // nothing to do