[PATCH 1/1] win32u: Do not adjust old valid rect when moving child window bits.

[Rémi Bernon]

From: Rémi Bernon

The child window is moved within its parent surface, the old / new visible rects
have moved with the child, but the surface did not and valid rects are correctly
positionned already.

Fixes: 602040c58cecb778972c2ade6efabaf3b9f963ff
Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=57334
---
 dlls/win32u/window.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/dlls/win32u/window.c b/dlls/win32u/window.c
index e3b0b3499e5..48a7304b6b0 100644
--- a/dlls/win32u/window.c
+++ b/dlls/win32u/window.c
@@ -2132,7 +2132,8 @@ static BOOL apply_window_pos( HWND hwnd, HWND insert_after, UINT swp_flags, stru
                 user_driver->pMoveWindowBits( hwnd, &old_rects, new_rects, valid_rects );
             else
             {
-                OffsetRect( &rects[1], new_rects->visible.left - old_rects.visible.left, new_rects->visible.top - old_rects.visible.top );
+                /* move a child window bits within its parent window surface, the surface itself
+                 * didn't move and valid rects are already relative to the surface rect. */
                 move_window_bits( hwnd, new_rects, valid_rects );
             }
         }