[PATCH 0/1] MR1306: win32u: When the window is not visible but has WS_VISIBLE flag, we should update the vis rgn.

[Jiajin Cui (＠jin-king1)]

When the child window and the parent window are no longer in the same process,
the parent window shadow does not update the vis rgn of the child window and
modify the WS_VISIBLE style of the child window. so we need to update the vis
rgn when another process gets the DC of the child window.

Signed-off-by: Jiajin Cui