fix(llc): fix pinnedMessage inconsistencies.

Signed-off-by: xsahil03x <[email protected]>

packages/stream_chat/lib/src/core/models/channel_state.dart

@@ -56,7 +56,7 @@ class ChannelState {
     ChannelModel? channel,
     List<Message>? messages,
     List<Member>? members,
-    List<Message>? pinnedMessages,
+    List<Message> pinnedMessages = _emptyPinnedMessages,
     int? watcherCount,
     List<User>? watchers,
     List<Read>? read,
@@ -67,10 +67,9 @@ class ChannelState {
         members: members ?? this.members,
         // Hack to avoid using the default value in case nothing is provided.
         // FIXME: Use non-nullable by default instead of empty list.
-        pinnedMessages:
-            pinnedMessages == null || pinnedMessages == _emptyPinnedMessages
-                ? this.pinnedMessages
-                : pinnedMessages,
+        pinnedMessages: pinnedMessages == _emptyPinnedMessages
+            ? this.pinnedMessages
+            : pinnedMessages,
         watcherCount: watcherCount ?? this.watcherCount,
         watchers: watchers ?? this.watchers,
         read: read ?? this.read,