Zebediah Figura : rpcrt4: Use CONTAINING_RECORD in release_delegating_vtbl().

[Alexandre Julliard]

Module: wine
Branch: master
Commit: fe8f63ce729db45f5dd05699540b0e3778a8e17d
URL:    https://gitlab.winehq.org/wine/wine/-/commit/fe8f63ce729db45f5dd05699540b0e3...

Author: Zebediah Figura 
Date:   Mon Dec 12 14:06:31 2022 -0600

rpcrt4: Use CONTAINING_RECORD in release_delegating_vtbl().

---

dlls/rpcrt4/cstub.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/dlls/rpcrt4/cstub.c b/dlls/rpcrt4/cstub.c
index c9dbbb18b60..0f5bd0eda9f 100644
--- a/dlls/rpcrt4/cstub.c
+++ b/dlls/rpcrt4/cstub.c
@@ -334,7 +334,7 @@ IUnknownVtbl *get_delegating_vtbl(DWORD num_methods)

void release_delegating_vtbl(IUnknownVtbl *vtbl)
 {
-    struct delegating_vtbl *table = (struct delegating_vtbl *)((DWORD *)vtbl - 1);
+    struct delegating_vtbl *table = CONTAINING_RECORD(vtbl, struct delegating_vtbl, vtbl);

EnterCriticalSection(&delegating_vtbl_section);
     table->ref--;