reg_common
static SLPError reg_common(slp_handle_impl_t *, struct reg_msg *,
if ((err = reg_common(hSLP, msg, pvUser, callback)) == SLP_OK &&
if ((err = reg_common(hSLP, msg, pvUser, callback)) == SLP_OK) {
return (reg_common(hSLP, msg, pvUser, callback));