[libvirt] [PATCH] build: silence a clang false positive

[Jim Meyering]

Eric Blake wrote:
> * src/qemu/qemu_monitor.c (qemuMonitorIOWriteWithFD): Work around
> recent clang shortcoming in analysis.
...
> diff --git a/src/qemu/qemu_monitor.c b/src/qemu/qemu_monitor.c
...
>      cmsg = CMSG_FIRSTHDR(&msg);
> +    /* Some static analyzers, like clang 2.6-0.6.pre2, fail to see
> +       that our use of CMSG_FIRSTHDR will not return NULL.  */
> +    sa_assert(cmsg);
>      cmsg->cmsg_len = CMSG_LEN(sizeof(int));
>      cmsg->cmsg_level = SOL_SOCKET;
>      cmsg->cmsg_type = SCM_RIGHTS;

ACK.
Note that with clang-2.7, which is in rawhide, this sa_assert is not needed.