[PATCH 3/5] server: Notify child window thread in detach_child_window.

[Jacek Caban]

Signed-off-by: Jacek Caban <jacek(a)codeweavers.com>
---
Having WM_WINE_* in ntuser.h is not right long term, we will want it to 
be private to server and win32u, but it makes the conversion more 
convenient for now.

  dlls/user32/user_private.h | 18 ------------------
  dlls/user32/win.c          | 12 +-----------
  include/ntuser.h           | 19 +++++++++++++++++++
  server/window.c            |  6 +++---
  4 files changed, 23 insertions(+), 32 deletions(-)