Fix clang 13 compilation problems (#5791)

* Fix clang 13 compilation problems

Re-instated ShowPlayedSequencesDebug logic by introducing no-op lambda
which replaces missing `Draw2dLabel` functionality ( added TODO marker
there )

Signed-off-by: nemerle <96597+nemerle@users.noreply.github.com>

* apply review suggestions

Signed-off-by: nemerle <96597+nemerle@users.noreply.github.com>

* Fix type in assert message

Signed-off-by: nemerle <96597+nemerle@users.noreply.github.com>

Code/Editor/BaseLibraryManager.cpp

@@ -606,11 +606,9 @@ void CBaseLibraryManager::RegisterItem(CBaseLibraryItem* pItem, REFGUID newGuid)
 
     if (m_bUniqGuidMap)
     {
-        bool bNewItem = true;
         REFGUID oldGuid = pItem->GetGUID();
         if (!GuidUtil::IsEmpty(oldGuid))
         {
-            bNewItem = false;
             m_itemsGuidMap.erase(oldGuid);
         }
         if (GuidUtil::IsEmpty(newGuid))