Alexandre Julliard : ddraw: Use SecureZeroMemory to clear the clipper vtbl.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 540219df966edc35d29a6be6fc2beebb92c3b7d6
URL:    https://gitlab.winehq.org/wine/wine/-/commit/540219df966edc35d29a6be6fc2beeb...

Author: Alexandre Julliard 
Date:   Tue Nov  7 22:58:40 2023 +0100

ddraw: Use SecureZeroMemory to clear the clipper vtbl.

---

dlls/ddraw/clipper.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/dlls/ddraw/clipper.c b/dlls/ddraw/clipper.c
index 9718ac0b162..3159a34cb5a 100644
--- a/dlls/ddraw/clipper.c
+++ b/dlls/ddraw/clipper.c
@@ -109,7 +109,9 @@ static ULONG WINAPI ddraw_clipper_Release(IDirectDrawClipper *iface)
     {
         if (clipper->region)
             DeleteObject(clipper->region);
-        clipper->IDirectDrawClipper_iface.lpVtbl = NULL; /* Should help with detecting freed clippers. */
+        /* make sure the object is no longer considered valid */
+        SecureZeroMemory( &clipper->IDirectDrawClipper_iface.lpVtbl,
+                          sizeof(clipper->IDirectDrawClipper_iface.lpVtbl) );
         free(clipper);
     }