comctl32/listview: support header images

[Nikolay Sivov]

On 1/6/2013 02:55, Daniel Jelinski wrote:
> They are unrelated, except by file modified, and I'm sending them as I
> create them, but of course I can defer sending them a little.
> Do you mean message sequence tests or something else? I tested that
> visually with delphi, but I guess that's not what you're asking for.

I mean to test that header gets image list after it's set for listview, 
and that same handle is reused.
>
> 2013/1/5 Nikolay Sivov <bunglehead at gmail.com>:
>> On 1/6/2013 02:25, Daniel Jelinski wrote:
>>
>> This one needs tests. Also even if each patch applies cleanly, please send
>> them in series, it makes it easier to review.