Fixing wrong object being passed to select()

couchdb.lua

@@ -104,7 +104,7 @@ function create_document(schema)
  local obj = delegate(Document)
  if schema.id then
  obj.id = schema.id
- obj.schema = select(obj, function(v,k) return k ~= 'id' end)
+ obj.schema = select(schema, function(v,k) return k ~= 'id' end)
  else
  obj.schema = schema
  end