More randomizer fixes?

tetris/modes/gamemode.lua

@@ -52,7 +52,7 @@ end
 
 function GameMode:initialize()
 	-- after all the variables are initialized, run initialization procedures
-	for i = 1, 30 do
+	for i = 1, self.next_queue_length do
 		table.insert(self.next_queue, self:getNextPiece(ruleset))
 	end
 end

tetris/randomizers/bag5alt.lua

@@ -4,7 +4,7 @@ local Bag5AltRandomizer = Randomizer:extend()
 
 function Bag5AltRandomizer:initialize()
 	self.bag = {"I", "J", "L", "O", "T"}
-	self.prev = "O"
+	self.prev = nil
 end
 
 function Bag5AltRandomizer:generatePiece()