unique bullet base instances

peel off new copies of ammo when using a new gun so we can upgrade it without screwing up the base stats

vacuum_gambit.p8

@@ -126,8 +126,7 @@ end
 function _init()
  mode = game_mode
  init_blip_pals()
-	wipe_level()
-	primary_ship.main_gun = zap_gun_p.new()  -- redundant?
+	wipe_game()  -- redundant?
 	load_level(example_level_csv)
 	game_state = game
 	pal(2,129)
@@ -157,7 +156,7 @@ function init_hpcols()
  hpcols = hpcols_lut[min(primary_ship.maxhp,6)]
 end
 
-function wipe_level()
+function wipe_game()
  xpwhoosh = nil
  primary_ship = player.new()
  init_hpcols()
@@ -170,6 +169,8 @@ function wipe_level()
  intangibles_bg = linked_list.new()
  events = linked_list.new()
  new_events = linked_list.new()
+	primary_ship.main_gun = zap_gun_p.new()
+ primary_ship.main_gun:peel()
 end
 
 function _update60()
@@ -689,6 +690,7 @@ gun_base = mknew{
 -- themselves to the player
 function gun_base:action()
  local item = self.new()
+ item:peel()
  item.ammo = item.maxammo
  if not primary_ship.special_guns then
   primary_ship.special_guns = {item}
@@ -697,6 +699,19 @@ function gun_base:action()
  end
 end
 
+-- make shot type unique so
+-- stat modifications do not
+-- damage base data
+function gun_base:peel()
+ self.munition = self.munition.new()
+end
+
+-- default firing behavior:
+-- single shot
+function gun_base:actually_shoot(x, y)
+ self.munition.new{}:spawn_at(x, y)
+end
+
 function bullet_base:hitship(_)
  self:die()
  return true
@@ -720,14 +735,6 @@ function bullet_base:draw()
  spr(self.sprite, self.x, self.y, self.width, self.height)
 end
 
--- An `actually_shoot` factory
--- for trivial guns
-function spawn_one(t)
- return function(gun, x, y)
-  t.new{}:spawn_at(x, y)
- end
-end
-
 function bullet_base:spawn_at(x, y)
  self.x = x - self.x_off
  self.y = y - self.y_off
@@ -780,11 +787,11 @@ zap_p = mknew(zap_e.new{
 
 zap_gun_e = mknew(gun_base.new{
  cooldown = 0x0.0020, -- frames between shots
- actually_shoot = spawn_one(zap_e),
+ munition = zap_e,
 })
 
 zap_gun_p = mknew(zap_gun_e.new{
- actually_shoot = spawn_one(zap_p),
+ munition = zap_p,
  hdr = "mAIN gUN",
 })
 
@@ -843,7 +850,7 @@ blast_gun = mknew(gun_base.new{
  cooldown = 0x0.0078, -- 120 frames between shots
  ammo = 5,
  maxammo = 5,
- actually_shoot = spawn_one(blast),
+ munition = blast,
  hdr = "bLASTER",
  body= [[plasma orb
 cuts through