patching pylint.el

[lgfang]

Hi,

I think this is a bug of pylint.el.  But I failed finding a way to
submit the bug neither in its official site nor in google.  So I post
it here wishing it may be useful for some buddies.

The bug is that it uses "compile-internal" from "compile" without
require compile.  So "M-x pylint" will fail if compile hadn't been
loaded in advance by any means.

My fix is rather straightforward: add "(require 'compile)" in the code.

------ begin diff output ------
2a3
>   (require 'compile)
------ end diff output ------

Fang lungang