fixed surface deletion indexing nil

changelog.txt

@@ -7,6 +7,7 @@ Date: 17. 12. 2021
   Bugfixes:
     - Fixed onBuilderArrived if the builder was a unit and not a group (Thanks DBotThePony for reporting)
     - Fixed adding player to chunk crash
+    - Fixed surface deletion with chunk processor indexing nil
 
 ---------------------------------------------------------------------------------------------------
 Version: 2.0.3

libs/ChunkProcessor.lua

@@ -88,6 +88,7 @@ function chunkProcessor.processPendingChunks(universe, tick, flush)
             pendingChunks[eventId] = nil
             local map = event.map
             if not map.surface.valid then
+                universe.chunkProcessorIterator = newEventId
                 return
             end