made vi not choke when opening a new file, as well as actually preserve the file name

lib/ed.lua

@@ -17,7 +17,7 @@ end
 function ed.bfunc:save(fpath)
  local path = fpath or self.path
  if not path then return false, "no path" end
-	self.path = path
+  self.path = path
  local f = io.open(path,"wb")
  if not f then return false, "unable to open file" end
  for k,v in ipairs(self) do
@@ -112,6 +112,7 @@ function ed.newBuffer()
 end 
 
 function ed.open(buffer)
+ local bpath = buffer
  if ed.buffers[buffer] then
   buffer = ed.buffers[buffer]
  end
@@ -120,7 +121,9 @@ function ed.open(buffer)
   nb:load(buffer)
   buffer = nb
  end
- if type(buffer) ~= "table" then buffer = ed.newBuffer() buffer[1] = "" end
+ if type(buffer) ~= "table" then buffer = ed.newBuffer() end
+ buffer[1] = buffer[1] or "" 
+ buffer.path = buffer.path or bpath
  return buffer
 end