[BUG] ob-sqlite: can not override header argument

[Max Nikulin]

It seems there is no way to override for a specific code block header 
arguments specified for the whole file through #+property:

#+property: header-args:sqlite :header
#+begin_src elisp :results none
  (require 'ob-sqlite)
#+end_src

I have tried "nil", etc. for ":header", but column names are always 
added to results.

#+begin_src sqlite :results verbatim :header no
        select 1 as "one", 2 as "two"
#+end_src

#+RESULTS:
: one,two
: 1,2

Bonus: it seems condition for :csv is inverted, so -csv is always added. 
I have not managed to override comma using :separator since -csv is 
added later.

I am just testing a patch for ob-sqlite, I am not a real user of it.