IBMF_MSG_FLAGS_ON_LIST
ASSERT((ibmf_msg_impl->im_flags & IBMF_MSG_FLAGS_ON_LIST) == 0);
!(msg_flags & IBMF_MSG_FLAGS_ON_LIST) &&
msgimplp->im_flags &= ~IBMF_MSG_FLAGS_ON_LIST;
msgimplp->im_flags |= IBMF_MSG_FLAGS_ON_LIST;
!(msg_flags & IBMF_MSG_FLAGS_ON_LIST) &&
!(msg_flags & IBMF_MSG_FLAGS_ON_LIST) &&