Fix music player playlist crash

Author: laktyushin

submodules/TelegramUI/Sources/ChatHistoryEntriesForView.swift

@@ -120,8 +120,6 @@ func chatHistoryEntriesForView(
         }
     }
 
-    //var existingGroupStableIds: [UInt32] = []
-    //var groupBucket: [(Message, Bool, ChatHistoryMessageSelection, ChatMessageEntryAttributes, MessageHistoryEntryLocation?)] = []
     var count = 0
     loop: for entry in view.entries {
         var message = entry.message
@@ -198,7 +196,7 @@ func chatHistoryEntriesForView(
         }
 
         if groupMessages || reverseGroupedMessages {
-            if let messageGroupingKey = message.groupingKey, (groupMessages || reverseGroupedMessages) {
+            if let messageGroupingKey = message.groupingKey {
                 let selection: ChatHistoryMessageSelection
                 if let selectedMessages = selectedMessages {
                     selection = .selectable(selected: selectedMessages.contains(message.id))
@@ -271,6 +269,22 @@ func chatHistoryEntriesForView(
         }
     }
 
+    if !groupMessages && reverseGroupedMessages {
+        var flatEntries: [ChatHistoryEntry] = []
+        
+        for entry in entries {
+            switch entry {
+            case let .MessageGroupEntry(_, messages, presentationData):
+                for (message, isRead, selection, attributes, location) in messages {
+                    flatEntries.append(.MessageEntry(message, presentationData, isRead, location, selection, attributes))
+                }
+            default:
+                flatEntries.append(entry)
+            }
+        }
+        entries = flatEntries
+    }
+    
     let insertPendingProcessingMessage: ([Message], Int) -> Void = { messages, index in
         let serviceMessage = Message(
             stableId: UInt32.max - messages[0].stableId,