Alexandre Julliard : user32: Fix wraparound check to avoid gcc optimization.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 7507541a5bac5a42558610acebd1cf70c02cc7a9
URL:    https://source.winehq.org/git/wine.git/?a=commit;h=7507541a5bac5a42558610acebd1cf70c02cc7a9

Author: Alexandre Julliard <julliard at winehq.org>
Date:   Mon Nov 26 20:17:30 2018 +0100

user32: Fix wraparound check to avoid gcc optimization.

Signed-off-by: Alexandre Julliard <julliard at winehq.org>

---

 dlls/user32/win.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/dlls/user32/win.c b/dlls/user32/win.c
index 95f5ac7..dd6142d 100644
--- a/dlls/user32/win.c
+++ b/dlls/user32/win.c
@@ -1611,8 +1611,8 @@ HWND WIN_CreateWindowEx( CREATESTRUCTW *cs, LPCWSTR className, HINSTANCE module,
     if (cy < 0) cy = 0;
     SetRect( &rect, cs->x, cs->y, cs->x + cx, cs->y + cy );
     /* check for wraparound */
-    if (cs->x + cx < cs->x) rect.right = 0x7fffffff;
-    if (cs->y + cy < cs->y) rect.bottom = 0x7fffffff;
+    if (cs->x > 0x7fffffff - cx) rect.right = 0x7fffffff;
+    if (cs->y > 0x7fffffff - cy) rect.bottom = 0x7fffffff;
     if (!set_window_pos( hwnd, 0, SWP_NOZORDER | SWP_NOACTIVATE, &rect, &rect, NULL )) goto failed;
 
     /* send WM_NCCREATE */