[3/5] comctl32/treeview: Make tests not depend from each other, replace some magics with macros

[Paul Vriens]

Nikolay Sivov wrote:
> Currently tests are dependent which makes it impossible to change only one,
> could be possible actually, but not always. Anyway separate tests are better.
> 
> Changelog:
>     - Make test not depend from each other, replace some magics with macros
> 

Hi Nikolay,

Looks like this one introduced 1 failure on several boxes (XP, W2K3, 
Vista and W2K8) and 1 more on Vista boxes:

http://test.winehq.org/data/tests/comctl32:treeview.html

Could you have a look?

-- 
Cheers,

Paul.