Transfer only cbStruct size in BindCtxImpl_S(G)etOptions.

dlls/ole32/bindctx.c

@@ -302,8 +302,12 @@ HRESULT WINAPI BindCtxImpl_SetBindOptions(IBindCtx* iface,LPBIND_OPTS2 pbindopts
     if (pbindopts==NULL)
         return E_POINTER;
     
-    This->bindOption2=*pbindopts;
-
+    if (pbindopts->cbStruct > sizeof(BIND_OPTS2))
+    {
+        WARN("invalid size");
+        return E_INVALIDARG; /* FIXME : not verified */
+    }
+    memcpy(&This->bindOption2, pbindopts, pbindopts->cbStruct);
     return S_OK;
 }
 
@@ -319,8 +323,12 @@ HRESULT WINAPI BindCtxImpl_GetBindOptions(IBindCtx* iface,LPBIND_OPTS2 pbindopts
     if (pbindopts==NULL)
         return E_POINTER;
 
-    *pbindopts=This->bindOption2;
-    
+    if (pbindopts->cbStruct > sizeof(BIND_OPTS2))
+    {
+        WARN("invalid size");
+        return E_INVALIDARG; /* FIXME : not verified */
+    }
+    memcpy(pbindopts, &This->bindOption2, pbindopts->cbStruct);
     return S_OK;
 }