Minor fixes for previous commit

Data/Scripts/002_Save data/005_Game_SaveConversions.rb

@@ -178,7 +178,9 @@ SaveData.register_conversion(:v19_convert_game_variables) do
   display_title 'Converting classes of things in Game Variables'
   to_all do |save_data|
     variables = save_data[:variables]
-    variables.each_with_index do |value, i|
+    for i in 0..5000
+      value = variables[i]
+      next if value.nil?
       if value.is_a?(Array)
         value.each_with_index do |value2, j|
           if value2.is_a?(PokeBattle_Pokemon)

Data/Scripts/016_UI/022_UI_PurifyChamber.rb

@@ -24,7 +24,7 @@ class PokemonGlobalMetadata
   # @deprecated Use {Player#seen_purify_chamber} instead. This alias is slated to be removed in v20.
   def seenPurifyChamber
     Deprecation.warn_method('PokemonGlobalMetadata#seenPurifyChamber', 'v20', '$Trainer.seen_purify_chamber')
-    return (!@seenPurifyChamber.nil?) ? @seenPurifyChamber : $Trainer.seen_purify_chamber
+    return @seenPurifyChamber || false
   end
 
   # @deprecated Use {Player#seen_purify_chamber=} instead. This alias is slated to be removed in v20.
@@ -40,7 +40,7 @@ class PokemonGlobalMetadata
   # @deprecated Use {Player#has_snag_machine} instead. This alias is slated to be removed in v20.
   def snagMachine
     Deprecation.warn_method('PokemonGlobalMetadata#snagMachine', 'v20', '$Trainer.has_snag_machine')
-    return (!@snagMachine.nil?) ? @snagMachine : $Trainer.has_snag_machine
+    return @snagMachine || false
   end
 
   # @deprecated Use {Player#has_snag_machine=} instead. This alias is slated to be removed in v20.