fixed #339

Author: sglienke

Source/Base/Collections/Spring.Collections.MultiMaps.pas

@@ -565,6 +565,7 @@ constructor TMultiMapBase<TKey, TValue>.Create(
   fHashTable.Initialize(TypeInfo(TItems), @EqualsThunk, fKeyComparer);
 
   fOnDestroy := TNotifyEventImpl.Create;
+  fOnDestroy.UseFreeNotification := False;
 end;
 
 destructor TMultiMapBase<TKey, TValue>.Destroy;