[PATCH 10/11] win32u: Move IsWindowVisible implementation from user32.

[Jacek Caban]

Signed-off-by: Jacek Caban <jacek(a)codeweavers.com>
---
  dlls/user32/win.c    | 15 +--------------
  dlls/win32u/window.c | 21 +++++++++++++++++++++
  include/ntuser.h     |  1 +
  3 files changed, 23 insertions(+), 14 deletions(-)