diff -r aa4f99b96c6d -r 0bba06a05d52 share/hedgewars/Data/Missions/Campaign/A_Classic_Fairytale/united.lua
--- a/share/hedgewars/Data/Missions/Campaign/A_Classic_Fairytale/united.lua	Tue Jan 22 07:47:27 2019 +0100
+++ b/share/hedgewars/Data/Missions/Campaign/A_Classic_Fairytale/united.lua	Tue Jan 22 17:40:46 2019 +0100
@@ -289,7 +289,7 @@
 end
 
 function GetVariables()
-  m2DenseDead = tonumber(GetCampaignVar("M2DenseDead"))
+  m2DenseDead = tonumber(GetCampaignVar("M2DenseDead")) or 0
   if m2DenseDead == 1 then
     denseDead = true
   end