comctl32: add ListView_SetCheckState and ListView_GetCheckState withtests(try4)

[Dmitry Timoshkov]

"André Hentschel" <nerv at dawncrow.de> wrote:

> now with LVITEMW and SNDMSGW

You are still casting to LPLVITEMA in ListView_SetCheckState while
using LVITEMW and SNDMSGW. As been said by using SNDMSGW/LVITEMW you
are making these macros incompatible with PSDK ones, and breaking
compatibility if someone will try to compile a non-unicode application
with Wine headers.

-- 
Dmitry.