fixed nil name in upgrade entity

Upgrade.lua

@@ -550,7 +550,7 @@ function upgrade.attempt(universe)
             end
         end
 
-        game.print("Rampant - Version 2.0.2")
+        game.print("Rampant - Version 2.0.3")
     end
 
     return (starting ~= global.version) and global.version

changelog.txt

@@ -2,7 +2,8 @@
 Version: 2.0.3
 Date: 15. 12. 2021
   Bugfixes:
-    - Fixed typo in require import for upgrade on setChunkBase
+    - Fixed typo in require import for upgrade on setChunkBase (Thanks Eerrikki for reporting)
+    - Fixed upgradeEntity could return a nil name which failed in a surface.create_entity call (Thanks SimplyData for reporting)
 
 ---------------------------------------------------------------------------------------------------
 Version: 2.0.2

libs/BaseUtils.lua

@@ -281,7 +281,7 @@ function baseUtils.upgradeEntity(entity, base, map, disPos, evolve, register)
                                           map,
                                           evolve)
 
-    if (spawnerName ~= entity.name) then
+    if spawnerName and (spawnerName ~= entity.name) then
         local entityData = {
             ["name"] = spawnerName,
             ["position"] = disPos,