remove draw_debug since it doesn't work; add "puke" debug helper

linked lists don't have a measurable length. will use a persistent intangible for debug dumps in the future. `puke` however can be used at the CLI to dump a table. I need to write a `listpuke` variant too

updatedshmup.p8

@@ -9,8 +9,6 @@ game = 1
 win = 2
 lose = 3
 
-debug = {}
-
 function usplit(str)
  return unpack(split(str))
 end
@@ -251,7 +249,6 @@ end
 
 function _draw()
  drawgame()
- draw_debug()
  if (state == game) fadelvl = -45
  if (state == win) dropshadow("win",50,61,11)
  if (state == lose) dropshadow("fail",48,61,8)
@@ -291,21 +288,19 @@ function fadescreen()
  end
 end
 
-function draw_debug()
- cursor(0,0,7)
- -- uncomment the followingh
- -- to display object counts
---[[
- print("es "..tostr(#eships))
- print("eb "..tostr(#ebullets))
- print("pb "..tostr(#pbullets))
- print("ib "..tostr(#intangibles_bg))
- print("if "..tostr(#intangibles_fg))
- print("v  "..tostr(#events))
-]]
- if (#debug==0) return
- foreach(debug,print)
- debug={}
+function puke(item, indent)
+ indent = indent or 0
+ local pfx = ""
+ for _=1,indent do
+  pfx ..= " "
+ end
+ if (type(item) ~= "table") return pfx..tostr(item)
+ ret = pfx.."{"
+ pfx = "\n"..pfx
+ for k, v := pairs(item) do
+  ret ..= pfx..tostr(k)..": "..puke(v, indent+1)
+ end
+ return ret..pfx.."}"
 end
 
 function drawgame()