SafeArrayDestroy() returns success when called with a NULL

dlls/oleaut32/safearray.c

@@ -1337,7 +1337,7 @@ HRESULT WINAPI SafeArrayDestroy(SAFEARRAY *psa)
   TRACE("(%p)\n", psa);
 
   if(!psa)
-    return E_INVALIDARG;
+    return S_OK;
 
   if(psa->cLocks > 0)
     return DISP_E_ARRAYISLOCKED;

dlls/oleaut32/tests/safearray.c

@@ -258,6 +258,9 @@ static void test_safearray(void)
 	LONG		l;
 	unsigned char	*ptr1, *ptr2;
 
+	hres = SafeArrayDestroy( NULL);
+	ok( hres == S_OK, "SafeArrayDestroy( NULL) returned 0x%lx\n", hres);
+
 	bound.cElements	= 1;
 	bound.lLbound	= 0;
 	a = SafeArrayCreate(-1, 1, &bound);