Show blocked moves as an animated X.

I am not convinced the sprite is very good. This could help the player learn what pulls were considered before proposing the ones that would occur if the player pulled the tongue. Or it's just visual noise that sucks. Anyway, this correctly captures what the blocked considered moves were, and we can decide whether to use it or not.

chameleonic.p8

@@ -1927,24 +1927,23 @@ function persist:init0()
  cartdata("ulimate_lizard_total_destruction_0_1")
  self.init0 = self.read
  self:read()
- self.ready=true
 end
 
 function persist:read()
+ self.ready=false
  local m = dget(0) == 0
  self.music = m
  if m then music_on() else music_off() end
  self.max_level = dget(1)
  self.recent_level = dget(2)
+ self.ready=true
 end
 
 function persist:wipe()
- self.ready=false
  for i=0,64 do
   dset(i,0)
  end
  self:read()
- self.ready=true
 end
 
 function persist:lvlstart()