rpcrt4: Don't open code CONTAINING_RECORD().

[Michael Stefaniuc]

---
 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 0ddb1aa..838ed03 100644
--- a/dlls/rpcrt4/cstub.c
+++ b/dlls/rpcrt4/cstub.c
@@ -59,7 +59,7 @@ typedef struct
 
 static inline cstdstubbuffer_delegating_t *impl_from_delegating( IRpcStubBuffer *iface )
 {
-    return (cstdstubbuffer_delegating_t*)((char *)iface - FIELD_OFFSET(cstdstubbuffer_delegating_t, stub_buffer));
+    return CONTAINING_RECORD(iface, cstdstubbuffer_delegating_t, stub_buffer);
 }
 
 HRESULT CStdStubBuffer_Construct(REFIID riid,
-- 
1.9.3