Null check for item runes (why is it even nil?)

Author: vaisest

src/Modules/CalcSetup.lua

@@ -1104,7 +1104,7 @@ function calcs.initEnv(build, mode, override, specEnv)
 				-- Rune / Soul Core Sockets
 				local socketed = 0
 				for i = 1, item.itemSocketCount do
-					if item.runes[i] ~= "None" then
+					if item.runes[i] and item.runes[i] ~= "None" then
 						socketed = socketed + 1
 						augmentCounts[item.runes[i]] = (augmentCounts[item.runes[i]] or 0) + 1
 					end